Most important uses of Google Webmaster tools:
1. Register for email notifications
2. Set preferred domain
3. Crawler and access errors
4. Fetch as Google
5. Search queries, links to your site and Internal links
You can also disavow unwanted links to your site.
Webmasters tools can also be used to target users according to the demographics. Enhancing good performance in Local SEO.
Yes, disavow tools is also important things of webmaster tools.
I have not heard of Disavow. How does it work exactly?
Google Webmaster Tools shows you how Google sees your site as a search engine.
Webmaster tool is a search engine tool which helps to submit your website to increase the visibility of your domain in search engines. They also help to submit sitemap, check for website errors, check for website backlinks and analyze various other data to improve search engine ranking for your domain.
Webmaster tool is one of the best tool for website in optimization point of view, it has lots of function.
Google webmaster tool allow to check indexing status and optimize visibility of their website. You can also check error with your website and how you can fixed it.
Google Webmaster Tools (GWT) is the primary mechanism for Google to communicate with webmasters.