Semrush is an all-in-one SEO and digital marketing platform. It provides keyword research, competitor analysis, site auditing, rank tracking, content optimization, and backlink analysis. Unlike Google Search Console (which shows your own data), Semrush aggregates public data about the entire SERP—you can analyze competitors, discover content gaps, and benchmark your strategy. Semrush is the most comprehensive SEO tool for agencies and enterprise SEO teams. It combines multiple smaller tools into one suite with shared data and workflows.