What Is SEO?


Let's picture the vast ocean of the Internet as a giant global library, and search engines like Google or Bing as the librarians of that enormous library. When we search for something online, we're essentially asking these digital librarians a question.


SEO is a strategy aimed at organizing and presenting a website's content so that these digital librarians can find it easily and consider it relevant to whoever's looking for answers. In simple terms, it's the practice of optimizing your online presence so a website shows up near the top when someone searches for something related to its content.


Origins and Evolution: In the early 1990s, when the web was still a limited space, a handful of primitive search engines emerged, tasked with indexing and cataloging files available on servers across this fledgling network.


Archie, short for "Archives" (dropping the "v"), was one of these engines, developed in 1990 by Alan Emtage, a graduate student at McGill University in Montreal, Canada. Its main job was to crawl and catalog FTP (File Transfer Protocol) files available on network servers. Archie focused on indexing files accessible via the FTP protocol.


It's worth noting that Archie focused mainly on FTP resources and text files. The web wasn't yet made up mostly of HTML pages and multimedia content the way we know it today. This search engine was an essential precursor that paved the way for more advanced engines and the later explosion of the World Wide Web.


The real turning point in the evolution of SEO, though, came with the arrival of Google in 1998. Its revolutionary algorithm, known as PageRank, introduced the concept of Page Authority. PageRank assessed a page's relevance and authority based on the quantity and quality of the links pointing to it. This innovative approach marked the start of an era in which building quality links became a central pillar of SEO.


Page Authority refers to how much a web page is perceived as valuable and trustworthy. That authority is built through the quality and relevance of its inbound links. The more links from respected websites point to a page, the higher its authority. Google considers pages with higher authority to be more trustworthy, and therefore tends to rank them higher in search results.


Over time, SEO evolved to keep pace with Google's algorithm updates. Content quality and user experience also became crucial factors. Algorithms like Panda and Penguin highlighted the importance of relevant, high-quality content.


The evolution of SEO reflects an ongoing effort to improve how users find information across the vast digital landscape, and page authority remains a fundamental pillar in how search engines rank content.


Why SEO Matters


Why is SEO so crucial in the digital age? Imagine a website is a book sitting in the Internet's library. Wouldn't we rather it be in a prominent spot on the virtual shelves? SEO helps make exactly that happen. It's the key to gaining visibility, attracting visitors, and putting content in front of the people who are searching for exactly what the site offers.


Results and Ranking: When we run a search on Google, the results we get aren't random. They're meticulously organized by complex algorithms that assess the relevance of every web page. SEO lets you influence those algorithms so your content stands out and lands near the top of the results. In short, it's the engine that drives online presence, determining whether a site ends up first on the list or buried on a forgotten page.


There are four main SEO strategies that work together to "influence" these algorithms. There are more, of course, but the most important are: On-Page SEO, Technical SEO, Off-Page SEO and Local SEO.

Let's take a look at each one.


On-Page SEO


Optimization Strategies Within the Page: On-Page SEO refers to the practices and techniques applied directly to a web page's content and structure to improve its ranking in search engines: site scaffolding, navigability, the use of keywords and proper headings, describing images through the ALT attribute alongside a performant format, and content quality are all key aspects of this strategy.


Site Scaffolding: It's important to have a well-organized, semantic structure that helps search engines understand a page's layout, hierarchy and content. To do this, HTML gives us specific container elements to use inside the <body> element, which is a page's visible part:


  • <header>: Means "header," and it marks the top section of the page, where the logo, navigation menu and other important elements, like a log-in, are usually placed.
  • <nav>: This tag marks the "navigation" section of the page, generally placed inside the header. It's where the site's main navigation menu should go.
  • <main>: Means "main," and it's where a page's main content is organized. It acts as the primary container for the page's content.
  • <section>:
  • <article>: Using this tag indicates that the content inside it is independent and relevant on its own.
  • <footer>: Means "footer," and together with the header and main, it rounds out the page's overall structure, helping create a smooth, organized layout.

As we can see, clear, descriptive semantics are essential in HTML (and in every language).


Navigability: Having a clear, coherent navigation structure is essential to the user experience. A well-organized, easy-to-use navigation menu helps visitors find the information they're looking for.


Keywords: In the context of SEO, it's crucial to identify relevant Keywords for the site, then place them in strategic spots like titles, paragraphs, metadata, and the site's natural content. Using certain HTML tags can strengthen a page's optimization in this respect.
Keywords matter enormously for SEO, since they're the words users type into search engines to find information. By identifying and using the right keywords, you can boost a website's visibility and attract the right target audience.
There are websites that offer free keyword research tools, like Google Keyword Planner or SEMrush, which help identify the most relevant keywords for a website. It's important to analyze search trends related to the site's specific industry.


Headings: Building on the idea of keywords, headings are crucial for signaling the hierarchy and structure of content. The h1 heading is the most important, and it's generally used for the site's most important keyword. It's recommended to use only one h1 per page to highlight the main topic. H2 and h3 are used to organize subsections and subtopics, contributing to readability and structure, which also matter a great deal. H4, h5 and h6 are also part of this hierarchy, with h6 being the least important and least used. Generally, sites only go as deep as h3.


The following elements contribute to an effective, navigable, SEO-optimized content structure:


  • <h1>: The "H" stands for header, and the 1 refers to its hierarchy. It's the highest-ranking heading element, so it's recommended for the page title and main keyword. It's best to use only one per page.
  • <h2> <h3>: These elements come next in the heading hierarchy. They're suggested for subheadings with secondary, but still relevant, keywords.
  • <strong>: This element visually highlights words and gives them semantic emphasis, so it's also suggested for keywords.
  • <ul>, <ol> and <li>: Using ordered or unordered lists makes reading easier and more organized, improving the user experience. Google detects and values them.
  • <em>: Similar to strong, the em element visually highlights words and gives them emphasis. It's also suggested for keywords.
  • <br>: A line break that improves how content is presented.

Using these tags properly helps structure each page and its content clearly, highlighting the relevant words and giving search engines extra "signals" about which words act as the "bait" for the "fish" swimming around the web looking for content. Google relies on these tags to understand a site's structure and content in order to index it.


In short, On-Page optimization is essential for effectively communicating your page's content and relevance to search engines. Properly implementing structure, keywords and meta tags will contribute to better ranking and visibility in the results.


Technical SEO


Optimization Strategies Behind the Page:


Technical SEO focuses on a website's infrastructure and performance, as well as how search engines crawl and index its content, and its overall security. This work happens within the source code and in server configuration. Technical SEO and On-Page SEO complement each other, and in fact some practices could be considered part of both, Responsive Design, load speed built fundamentally on efficient code, image compression, internal link structuring, and the use of certain HTML elements are all things that are also On-Page, but they're all strategies aimed at making a site run efficiently.


Let's look at the most important aspects of this approach.


URL Structure: A URL's structure, or a site's address, has a direct impact on how a page ranks. Ideally, URLs should be descriptive, user-friendly, and contain relevant keywords. URLs should be clear, descriptive and easy to read for both users and search engines. Some recommended practices:


  • User-friendly: use relevant keywords in the URL to clearly describe the page's content.
  • Length: keep URLs short and concise to make them easier to read and understand.
  • Use of Hyphens: use hyphens (-) instead of underscores (_) to separate words in the URL.
  • 301 Redirects: redirect old URLs to new ones using 301 redirects to avoid duplicate content and preserve page authority.

For example:


URL: https://www.sabiduria.ar/blog/desarrollo-web/seo.php


Domain: www.sabiduria.ar


Path: /blog/desarrollo-web/seo.php


This structure provides valuable information for both users and search engines. Users can easily understand they're in the blog section and that the content is about web development and SEO. On top of that, relevant keywords appear naturally in the URL, contributing to search engine optimization.


Meta Elements: In HTML, a <meta> element is used to provide metadata about an HTML document. Metadata is data about data, information that describes aspects of the document, like its author, a description of its content, relevant keywords, character encoding, and other details that aren't shown directly on the web page but matter to search engines, social networks, or other systems that might analyze or index the content.


For example:


  • <meta name="description" content="Page description"> Provides a brief description of the page's content, shown in search results.
  • <title> The page title, unique and compelling.
  • <meta name="keywords" content="Comma-separated keywords"> A list of keywords relevant to the page.
  • <meta name="robots" content="index, follow"> Instructions for search engines about indexing and following the page's links.
  • <meta charset="utf-8"> Specifies the document's character encoding.
  • <meta http-equiv="X-UA-Compatible" content="IE=edge"> Ensures the browser uses the latest version of the rendering engine.
  • <meta name="author" content="Author's name"> Indicates the author or creator of the content.
  • <meta property="og:locale" content="en_US"> Regional setting for Open Graph (OG).
  • <meta property="og:type" content="website"> Content type for Open Graph (OG).
  • <meta property="og:site_name" content="Site name"> Site name for Open Graph (OG).
  • <meta name="viewport" content="width=device-width, initial-scale=1.0"> Display configuration for mobile devices.
  • <meta charset="utf-8"> Specifies the document's character encoding.

Before moving on, it's worth briefly expanding on the most common robots meta tags:


  • <meta name="robots" content="index, follow"> This tag lets search engines index the page and follow the links it contains. It's the default setting in most cases.
  • <meta name="robots" content="noindex, nofollow"> With this tag, you're telling search engines not to index the page and not to follow its links.
  • <meta name="robots" content="noindex"> Similar to the previous one, this tag tells search engines not to index the page, but allows them to follow its links.
  • <meta name="robots" content="index, nofollow"> Indicates the page can be indexed, but its links shouldn't be followed.
  • <meta name="robots" content="noindex, follow"> Here, we're telling search engines not to index the page, but to follow the links it contains.

These elements provide valuable information for search engines and other systems that analyze and present a web page's content. By optimizing and customizing this metadata, you can improve a page's visibility and ranking in search results.


Crawling and Indexing: It's important for search engines to be able to crawl and index a website's content efficiently. To start showing up in search results, you first need to sign up for Google Search Console, Google's tool for webmasters and site owners that lets them index, monitor and maintain their site's presence in Google's search results. You need to create a Google account and add ownership of a domain. To do this, the tool generates an ownership meta tag that must be added to the source code of the site's main page. Once ownership is verified, you gain access to a range of tools and reports to monitor and improve your site's presence on Google. On top of that, you should combine this with other key practices to make crawling and indexing easier:


  • Sitemap File: an efficient way to help Google Search Console index the entire site is to create an XML Sitemap file listing all the important URLs you want indexed. This provides information about the site's structure and URLs, along with extra details like update frequency, indexing priority, and last-modified date.
  • robots.txt File: this type of file is used to tell search engines which parts of a website to crawl and which to ignore. The robots.txt file sits at the root of the site and contains instructions for search bots about which pages to crawl and which not to. For example, you can tell search engines not to crawl certain pages, directories or files that aren't relevant for indexing.
  • Internal Link Structuring: using effective internal links to connect URLs in a coherent way makes it easier for search engines to discover and index all your content.

These practices help ensure search engines can crawl and index a website's content efficiently, which is fundamental to improving visibility and ranking in search results.


Site Speed: load speed depends on several factors, hosting quality, image optimization, file compression, code minification, CDN usage, among others, all of which have a direct impact on user experience and ranking. Some considerations for efficient load speed:


  • Image Compression: optimize images for the web by compressing them without sacrificing too much quality. This significantly reduces page load time.
  • Minify Code: optimize CSS, JavaScript and HTML files to reduce their size and, in turn, speed up load times.
  • Using a CDN (Content Delivery Network): implement a CDN to statically distribute your content across servers located in different regions. This improves load speed for users in different parts of the world. A CDN, or Content Delivery Network, is a network of geographically distributed servers that work together to efficiently deliver web content, images, scripts, stylesheets and other media files, to end users. A CDN's main goal is to improve performance, load speed and the availability of websites.

Responsive Design: the use of mobile devices to access the internet has grown dramatically in recent years. As a result, it's crucial for a website to be optimized for mobile devices. A few considerations:


  • Adaptability: a website should be designed responsively, meaning it adapts and looks good on devices of different sizes, especially smartphones and tablets. If you'd like to learn more about Responsive Design, we recommend reading Responsive Design: Transforming the User Experience on the Web
  • Mobile UI Testing: run interface tests specifically for mobile devices to ensure a smooth, trouble-free user experience on these platforms.
  • Mobile Speed: optimize load speed for mobile devices, since mobile users tend to abandon sites that take too long to load on their devices.

Implementing these practices doesn't just improve Technical SEO, it also contributes to a better user experience, which can have a positive impact on search engine rankings.


Site Security (HTTPS): implementing the HTTPS protocol, or Hypertext Transfer Protocol Secure, is an essential component of a website's SEO and security strategy. In simple terms, HTTPS adds an extra layer of security by encrypting the communication between a user's browser and the server hosting the website. Let's dig a bit deeper into this concept and its implications.


What does HTTP mean, in plain terms? HTTP is the standard protocol that enables data transfer between a web browser and a server. However, information sent through HTTP isn't encrypted, meaning that, in theory, it could be intercepted and read by malicious third parties as it travels across the network.


HTTPS, on the other hand, adds a layer of security using an SSL/TLS certificate to encrypt data. This means that even if someone manages to intercept the communication, they won't be able to understand or modify the encrypted information, keeping users' privacy and security intact.


What happens if a site doesn't have an HTTPS certificate? Does it still get indexed? Search engines, like Google, have emphasized the importance of web security and HTTPS. If a site doesn't have an HTTPS certificate, it can still be indexed by search engines, but there's a clear preference for secure sites.


Following algorithm updates, Google has indicated it will prioritize secure sites in search results. On top of that, when a user visits a site without HTTPS, some modern browsers display a "Not secure" warning, which can negatively affect user trust and bounce rate.


In short, implementing HTTPS isn't just crucial for protecting user privacy and security, it can also have a positive impact on a site's visibility in search results. Web security is a core part of providing visitors with a trustworthy, protected experience.


Off-Page SEO


Optimization Strategies Outside the Page


Off-Page SEO refers to the practices and techniques applied outside a website's own pages to influence external factors that affect its authority, relevance and reputation. These factors, like social media followers and mentions, the quality of comments and reviews, and the quantity and quality of inbound links from other sites, act as endorsements of a website's relevance and standing. Search engines take this into account when determining ranking in search results. Let's take a closer look at some of the key Off-Page SEO strategies.


Backlinks: also known as inbound links, these are links coming from other websites. They act as votes of confidence and authority for search engines. Not all backlinks are equal, quality and relevance are essential. Getting links from high-authority sites relevant to your industry has a positive impact on your search ranking. That said, building backlinks should be done ethically and naturally, avoiding practices like buying links, which can have negative consequences.


How do you get them? There are several ways to earn quality backlinks:


  • Creating Valuable Content: high-quality, relevant content is more likely to get linked to naturally. This can include articles, infographics, case studies, and more.
  • Collaborations and Guest Posting: collaborating with other websites to publish relevant, valuable content is a great way to earn quality links. Build relationships with other sites in the same industry. Providing testimonials, collaborating on joint projects, or appearing as a guest on blogs and podcasts are excellent ways to earn genuine links.
  • Directory Listings: list your site in relevant industry directories. This not only generates links, it also improves local visibility. These directories can include Google My Business, Yelp, Bing Places, among others.

Social Media & Social Signals: there's no need to explain how important social media presence is today. It's important to be present on the platforms where your target audience spends time. On top of that, a company's social media accounts can appear in search results. The Page Authority of Instagram, Facebook, LinkedIn and X, for example, is very high, so having a presence on these networks can help improve visibility in search results. Social accounts can also be added to a page's source code through <meta> tags linking the site to them, letting you track interactions with your content and much more.
Interactions on social media platforms generate social signals that search engines factor in when assessing a website's relevance and popularity. Sharing content, getting "likes," comments and mentions on social media all help build a positive image. While social signals don't have a direct impact on ranking, social exposure can drive organic traffic, boost visibility and, ultimately, influence the factors that affect SEO.


Active participation, sharing content regularly, replying to comments, questions and direct messages, joining conversations and groups related to your industry, also boosts visibility and engagement.


It's important to use eye-catching visual content like images, infographics and/or videos, which drives more engagement on social media.


Online Reputation: reviews and comments online are a crucial part of Off-Page SEO. As we saw earlier, search engines factor in online reputation when determining a site's quality and trustworthiness. Encouraging and managing positive reviews can strengthen a website's credibility. On the flip side, proactively responding to negative comments also shows a commitment to customer satisfaction and helps mitigate negative impact. Review platforms and local directories are key places to build a positive reputation.


Asking satisfied customers for positive reviews on key platforms like Google My Business, Yelp and other relevant industry directories is a valuable tool.


Ongoing monitoring to keep track of brand mentions will help you address any reputation issue promptly.


In short, an effective Off-Page SEO strategy isn't just about earning external links, it's about building a solid web presence that reflects trustworthiness, relevance and user satisfaction. Combining quality backlinks, positive social interactions and a solid online reputation will help improve a site's position in search results and attract a broader audience.


Local SEO


Local Optimization Strategies:


Local SEO is a strategy focused on improving the visibility of a business or service in local searches. It's especially relevant for businesses offering products or services in specific locations. A local business, like a shop, a restaurant, or a doctor's office serving customers at a physical location, can benefit enormously from a Local SEO strategy. Some key Local SEO strategies include:


  • Google My Business: Google My Business is a free tool that lets businesses manage their presence on Google, including contact information, customer reviews, posts and photos. By creating and optimizing a Google My Business profile, businesses can show up in local search results and on Google Maps. It's important to fill out the business's information completely, including name, address, phone number, hours, and relevant business categories. On top of that, asking satisfied customers for reviews and responding to existing ones can improve credibility and visibility in local searches.
  • Local Directories: listing your business in local and industry-specific directories is a great way to improve visibility in local searches. Some examples of local directories include Yelp, TripAdvisor, Yellow Pages and Foursquare. Make sure your business information is consistent across all directories and kept up to date.
  • Local Keyword Optimization: using local keywords in your website's content and meta tags can improve ranking in local searches. Including location in your keywords, titles, descriptions and site content can help attract relevant traffic from the area.
  • Reviews and Testimonials: customer reviews and testimonials are essential for a local business's reputation and credibility. Asking satisfied customers for reviews and responding to existing ones can improve visibility and reputation in local searches.
  • Local Content Optimization: creating relevant, localized content, like blog posts, local events and promotions, can attract a local audience and improve visibility in local searches. Including information about local events, community news and special promotions can attract potential customers in the area.
  • Language and Localization: if a business serves a multilingual or international population, consider having versions of the website in different languages. Use hreflang tags to tell search engines which version of the website is relevant to users who speak different languages or are in different geographic locations.

In short, Local SEO is a valuable strategy for businesses looking to attract local customers and improve their presence in local searches. By optimizing business information, listing it in local directories, using local keywords, and encouraging positive reviews, businesses can improve their visibility and attract a relevant audience in their area.