SEO GLOSSARY
SEO concepts, explained in context
Browse the technical, content, measurement, link, local, and AI-search concepts behind day-to-day SEO work.
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HTTP Status Codes for SEOHTTP status codes are three-digit server responses such as 200, 301, 404, 429, or 503. For SEO, they show whether a crawler received content, was redirected, found nothing, or should try again later.IntermediateTechnical SEOHTTP and HTTPS Basics for SEOHTTP defines how clients and servers exchange web resources. HTTPS sends those HTTP messages through TLS, which protects their confidentiality and integrity and authenticates the server.BeginnerTechnical SEOHeader Tags and Content StructureHeader tags, semantic HTML, and breadcrumbs give a page recognizable structure. They help people read, assistive technologies navigate, and search systems understand how the parts of a page fit together.IntermediateOn-Page SEOHelpful ContentHelpful Content is content that helps people first: it solves a real task clearly, gives context, shows experience, and is more useful than a generic SEO summary.IntermediateContent SEOHreflang TagThe hreflang tag connects language and regional versions of a page so Google can show users the right local URL.AdvancedInternational Seo