Last year, Google enabled hosting companies to integrate Google services into their platforms; Google have now taken an additional step to improve access to Google webmaster services. “Parallels has integrated Google Services for Websites into Parallels Plesk Panel, used by millions of website owners globally to manage their websites. If you use Plesk for managing your hosting and website services, you can easily configure Webmaster Tools, Custom Search, Site Search, Web Elements and AdSense for your website right from within Plesk. Since Plesk knows what domains you own, it automatically registers your domains to Webmaster Tools and allows you to automatically login to the Webmaster Tools console to verify your sites, as shown below,” states Google.
More info: Google Services for Websites page