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Introduction to SEO

Introduction to SEO (Search Engine Optimization)

Section titled “Introduction to SEO (Search Engine Optimization)”

SEO is the art of convincing search engines (Google, Bing, Yahoo…) that your content is the best possible answer to users’ needs.
Without SEO, your website or app stays invisible: few clicks, little traffic, and low conversions.


  • Understand how search engines work
  • Know the main criteria of organic SEO
  • Master on-page and off-page signals
  • Optimize content writing for SEO

SEO is not a “trick” but a user-focused approach.
Google rewards content that is relevant, useful, and credible.

Three success factors:

  1. Help search engines understand your site (structure, tags, metadata)
  2. Show your content is trustworthy (authority, quality, reliability)
  3. Make content accessible and shareable

A search engine’s mission is to solve a problem or answer a question.
It relies on:

  • Crawlers (bots) to explore and index pages
  • Algorithms that rank results based on thousands of signals

Keywords represent users’ search queries.

To use them well:

  • Identify the search intent of your personas
  • Use the exact terms your audience uses
  • Create content that precisely addresses their needs

In France, Google holds over 95% of the search market.
SEO strategies should primarily target Google, without ignoring other search engines if your audience is there.


  • Panda: content quality
  • Penguin: link quality
  • Hummingbird: search intent understanding

Google updates its algorithm daily (minor changes) and rolls out major updates several times a year.


Human raters assess:

  • User intent
  • E-A-T (Expertise, Authority, Trustworthiness)
  • Real usefulness of the proposed content

  • Fast page load
  • Mobile-first design
  • Clean and readable code
  • Mandatory HTTPS
  • schema.org markup
  • Optimized titles and metadata
  • Useful, well-structured text
  • Rich content (images, videos, graphics)
  • Logical internal linking
  • Regular updates
  • Relevant outbound links
  • High-quality backlinks
  • Mentions on trustworthy websites
  • Social shares and brand citations
  • Relevant anchor texts
  • Clear navigation
  • Readable and accessible content
  • Smooth experience on both desktop and mobile

  • Natural, error-free writing
  • No keyword stuffing
  • Focus on user intent
  • How-to guides, lists, infographics
  • Videos, podcasts, optimized images
  • Ebooks and webinars for lead generation

  • Conversion rate
  • Bounce rate
  • Time on page
  • Traffic sources
  • Heatmaps, scroll tracking, click data
  • Google Analytics
  • Google Search Console
  • A/B testing tools
  • Behavior tracking tools (Hotjar, Clarity)

  • SEO is a long-term strategy
  • It’s based on understanding user needs
  • Optimized content is useful, structured, fast, and credible
  • SEO can’t be tricked — it must be earned and maintained