Google Search Console is Google's own free tool for monitoring how a site performs and gets indexed in Google Search.
It solves organic search monitoring: which queries drive clicks and impressions, indexing and coverage issues, Core Web Vitals, and structured-data errors. It's the foundational free complement to a paid SEO suite like Ahrefs, since it's the only source for Google's own click/impression data on your site.
Anyone with a website, from a solo blogger to an enterprise SEO team; typically run alongside Ahrefs or Semrush rather than instead of them, since it only reports what Google chooses to share about your own domain.
Completely free, no paid tier exists.
Free Google tool to monitor search performance.