Search Engine Optimization (SEO) Tools cover the platforms marketers and SEO specialists use to research keywords, audit on-page and technical SEO, track keyword rankings, build and audit backlinks, optimize content for ranking, and increasingly monitor visibility in AI-driven search experiences (AI Overviews, ChatGPT search, Perplexity). Core capabilities include keyword research, on-page SEO audits, technical SEO crawling, rank tracking across geographies and devices, backlink analysis and outreach, content optimization, and AI-search visibility monitoring (AEO/GEO). The market spans all-in-one platforms (Ahrefs, Semrush, Moz Pro), enterprise SEO suites (BrightEdge, Conductor, seoClarity), technical SEO crawlers (Screaming Frog, Lumar), and emerging AI-search-optimization tools (Profound, AthenaHQ).