The Web Design Glossary

Search Engine Optimization (SEO)

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Search Engine Optimization (SEO) is the process of improving a website so it ranks higher in search engine results for relevant queries. Strong SEO combines technical performance, useful content, and clear site structure so search engines can crawl, understand, and recommend your pages.

How SEO Works

Search engines use crawlers to discover pages, index their content, and rank them based on hundreds of signals. Ranking factors typically include relevance, content quality, page experience, authority, and how well the page matches user intent.

Types of SEO

On-Page SEO

Optimizing elements on the page itself: titles, headings, copy, internal links, image alt text, and structured data.

Technical SEO

Improving crawlability and performance through clean URLs, sitemaps, mobile-friendliness, Core Web Vitals, HTTPS, and correct indexing rules.

Off-Page SEO

Building credibility outside your site, most commonly through high-quality backlinks, brand mentions, and external references.

Key SEO Elements

  • Keyword research and intent matching
  • Title tags and meta descriptions
  • Heading hierarchy (H1–H6)
  • Internal linking and site architecture
  • Page speed and Core Web Vitals
  • Mobile usability
  • Structured data (schema markup)

Common SEO Mistakes

Keyword Stuffing

Forcing keywords unnaturally into content hurts readability and can reduce rankings.

Ignoring Technical Issues

Broken links, slow load times, and crawl errors can prevent otherwise strong content from ranking.

Thin or Duplicate Content

Pages with little unique value struggle to compete in search results.

SEO Best Practices

  1. Write for people first, then optimize for search engines
  2. Improve Core Web Vitals and overall page experience
  3. Use clear, descriptive titles and URLs
  4. Build a logical internal linking structure
  5. Publish original, useful content consistently
  6. Monitor performance with Search Console and analytics

SEO is an ongoing process. Sites that continuously improve content quality, technical health, and user experience are better positioned to earn sustainable organic traffic.

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