Google Search Console
(formerly Webmaster Tools) – Search Console is a free tool Google offers to webmasters. Within the tool are several areas that include data on how a site is performing in search. Search Console differs from Analytics – it does not measure traffic, it measures a site’s visibility on search pages, and indexability by Google crawler bots. Metrics Search Console measures are Click-Through Rate, Number of Indexed Pages, Number of Dead Links (AKA 404 pages), and more.