Or Google Search Console is a free service for anyone with Google account and verified domain. Search engine giant wants to help you to be found. Effective use of Webmaster Tools will improve website performance in any search engine and especially Google one, you could track and meager results and keep recording of your statistics data. This is the place where you submit your website XML site map and after check Google's crawl index, trace links routing to your web site, find out about your most popular pages and how visitors find you (what search query they use). In the past months Google started gradual transition to a new Search Console, promising it will be simpler, faster and has extra functionality like new Search Performance report, updated Index Coverage report and more. Check it out.