Google Webmaster Tools

It is free of charge tool that provides you the opportunity to evaluate, maintain and assess the performance of your website through the search engine.

They offer these services to legit everyone who actually owns a website. GWT is considered a platform for information that reaps its information from the biggest search engine across the world, providing you access to studies that may not be available otherwise. While you do not require GWT for your website to pop up immediately in search engine results, it does however help you by offering you the information that may actually be relevant to the way in which marketing works in your company.