Google webmaster tool is a search engine tool used to submit your website to increase the visibility in Google searches. The tool also helps to find backlinks, submit sitemap and analyze various data to improve optimization techniques for your website.
Webmaster is Google Tool that helps to track the activites on your website. It identifies the problems on your website like valid pages and states the click rate on your website, organic traffic volume. So, this tool is helpful in the optimization of your website.