SEO is a discipline that seems doomed to disappear every year according to headlines and predictions. The reality is very different: it remains a central pillar of any digital strategy. The emergence of artificial intelligence has not displaced it, but rather has highlighted its importance even more.

Within digital marketing, SEO not only attracts visitors, but also builds visibility and reinforces the brand’s position in a global and competitive environment. In this article we review its foundations, history and good practices to keep it at an optimal level.

What is SEO?

SEO is the acronym for Search Engine Optimization or Search Engine Optimization. It consists of a set of techniques and actions that seek to improve the visibility of a website in search engines such as Google or Bing.

Strategic importance

SEO is not a complement, it is a strategic pillar within digital marketing. Its main benefits include:

✔️ Generation of organic trafficthrough users who arrive naturally when searching for information related to the brand, products or services.

✔️ Building credibility and authorityby positioning quality content that reinforces trust in the brand.

✔️ Boost conversionbecause good SEO not only attracts visits, but also prepares users to advance in the decision process, whether to buy, register or leave their data.

Working on SEO is laying the foundations for a digital presence to be sustainable, visible and competitive, although it requires perseverance to see results.

How did SEO emerge and how has it changed until today?

First search engines

The first engines offered very limited functions. Archie (1990) indexed file listings on FTP servers. Shortly after, Yahoo! (1994) as a categorized directory and AltaVista (1995), which allowed queries in natural language.

At that time, the results lacked solid criteria for relevance or authority, and the amount of text or the date of indexing were often prioritized. This opened the door to rudimentary manipulation practices such as stuffing pages with irrelevant keywords.

PageRank and Google

The decisive change came in 1998 with Google and its PageRank algorithm, which measured the importance of a page according to the quantity and quality of the links it received. The mathematical basis came from Markov chains, calculating the probability that a user would reach a page by randomly following links.

This approach moved SEO from keyword repetition to site authority and popularity.

Modern evolution

As the web grew, engines became more sophisticated in their algorithms. Factors such as user experience, semantics, search intent and technical performance became decisive.

Google introduced Core Updates and consolidated the E-E-A-T (Experience, Expertise, Authoritativeness, Trustworthiness) philosophy so that sites demonstrated experience, credibility and trust. Today, SEO combines technical, content and strategic aspects, focusing on providing real and verifiable value to the user.

How does SEO work?

SEO relies on three interdependent processes: crawling, indexing and ranking.

✔️ Tracking: Search engine robots scour the web to discover new pages or updates. Tools like XML sitemaps and robots.txt files guide bots, while a logical URL structure makes it easy for them to follow internal links without friction. Incorrect redirects, 404 errors, or poorly applied canonicals block this process and degrade both indexing and the user experience.

✔️ Indexing: It implies that the search engine stores, interprets and can retrieve the page from its index. Not all crawled pages end up indexed: it depends on the perceived quality of the content and the semantic and technical structure. Google Search Console and Bing Webmaster Tools allow you to audit coverage and detect indexing problems.

✔️ Classification: Combines semantic, authority and user experience factors. The relevance to the query, domain and page authority, security and mobile usability, and the freshness of the content determine the position in results. Artificial intelligence does not replace these fundamentals, but rather amplifies the interpretation of these factors.

What are the best on-page SEO practices?

On-page SEO optimizes all the internal elements of a site so that search engines can correctly value the content.

✔️ Content structure: Hierarchical titles (H1, H2, H3), clear paragraphs and blocks of information that facilitate reading. Titles should be precise and accompanied by concise and attractive meta descriptions.

✔️ Keywords: Combination of general terms with long-tail keywords to capture qualified and relevant traffic.

✔️ Structured markup: Using Schema.org for engines to identify articles, products, reviews or events and improve visibility through rich snippets.

✔️ Image and multimedia optimization: Descriptive ALT attributes, weight less than 100 KB when possible and modern formats such as WebP.

✔️ Internal and external links: Strategically distributed to facilitate navigation, transfer authority and reinforce credibility. Quality prevails over quantity.

Solid on-page SEO combines quality content, clear structure, strategic keywords, technical optimization and well-managed links, building a lasting foundation that allows you to compete in search engines in the long term.

What is technical and off-page SEO and how does it improve authority and performance?

Technical and off-page SEO complements on-page SEO by ensuring that search engines can correctly crawl, index and rate a site, while also reinforcing its authority and reputation. While the on-page focuses on content, these areas encompass infrastructure, user experience and external signals that consolidate the digital presence.

Technical SEO

✔️ Optimized loading speed to improve user experience and reduce abandonment.

✔️ HTTPS security throughout the site, essential for user and search engine trust.

✔️ Mobile optimization, ensuring the site works correctly on any device.

✔️ Correct management of URLs and canonicals, including redirects and prevention of 404 errors to avoid duplications.

✔️ Clean and logical architecture, which facilitates search engine tracking and the correct distribution of internal authority.

✔️ Optimization of internal links and use of advanced microformats, such as breadcrumbs or FAQs, to improve visibility and understanding of the content.

Off-page SEO and authority

✔️ Quality backlinks from relevant and trustworthy sites, which consolidate the authority and credibility of the domain.

✔️ Avoid unethical practices that can generate penalties and damage reputation in the long term.

✔️ Generate valuable content that attracts links naturally, supporting trust and search engine positioning.

Performance and monitoring

✔️ Audit coverage, errors and trends using official tools such as Google Search Consoleand Bing Webmaster Tools.

✔️ Maintain consistency in link structure and update content as necessary.

✔️ Adapt the site to algorithm changes and new technologies, including artificial intelligence, to ensure continued relevance.

Taken together, well-executed technical and off-page SEO ensures that a site is not only visible and trustworthy, but also relevant and competitive, consolidating the foundations on which on-page SEO deploys its full potential.

Conclusion

SEO remains the most powerful tool to make a website stand out in a sustainable way. Artificial intelligence amplifies its reach, but the fundamentals remain intact.

If you want your digital presence to be solid and effective, start today by auditing your website, optimizing your content and reinforcing your domain authority. Every improvement counts and the stronger your SEO is now, the better prepared your site will be to deal with algorithm changes and new technologies.

There are no shortcuts, just consistent and strategic execution. At Vision by Data, we offer advice on SEO positioning. Find out more here.