What is SEO (Search Engine Optimization)?

Definition

SEO refers to all techniques aimed at improving a website's ranking in the organic results of search engines. It rests on three pillars: technical optimization, content quality, and domain authority.

SEO (Search Engine Optimization) is a digital marketing discipline that makes websites more visible in the natural results of search engines, particularly Google. Unlike SEA (Search Engine Advertising), it relies not on paid ads but on long-term structural and editorial work.

The three pillars of SEO

Technical SEO ensures search engines can crawl and index the site correctly. Content SEO produces pages that address user search intent with precision and depth. Off-page SEO builds the site's authority through inbound links (backlinks) from recognized sources.

Why SEO keeps evolving

Google's results pages now include AI summaries, featured snippets, and knowledge panels. Modern SEO must account for these new visibility zones, not just classic positions 1 through 10.

SEO generates organic traffic without paying per click: results take time to build but last. SEA (Google Ads) generates immediate traffic through paid ads that stop the moment the budget runs out. Both are complementary.

The first effects of a well-executed SEO strategy are typically visible within 3 to 6 months. Significant results on competitive queries often require 6 to 12 months of consistent work.

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Related terms

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GEO (Generative Engine Optimization)

GEO refers to all practices aimed at optimizing a brand's visibility in responses generated by LLMs such as ChatGPT, Claude, or Perplexity. The goal is not only to drive direct traffic, but to be cited as a reliable reference in AI-generated answers.

SEO

Backlink

A backlink is a hyperlink from an external website pointing to your site. It is one of the main authority signals considered by Google: the more links a site receives from reliable sources, the more it is treated as a reference.

SEO

Indexing

Indexing is the process by which a search engine decides to add a page to its database after crawling it. It is the prerequisite for any organic visibility: an unindexed page is invisible in SERPs, regardless of content quality.