Webmaster tools is yet another great free program from Google. Think of it has a Google check up for your site. Google Webmaster Tools address provides support for those looking to diagnose errors, improve a site’s visibility and declare preferences on how to handle web site listings. It can point on key pages that are not indexed, slow loading pages and much more. If even can warn you if you are using an outdated copy of WordPress. Below is an example of a message that would appear in your account if your version was too old.
Dear site owner or webmaster of http://YourDomain.com/,
Your site appears to be running an older version of WordPress. Google recommends that you update to the latest release. Older or unpatched software may be vulnerable to hacking or malware that can hurt your users. To download the latest release, visit the WordPress download page.
If you have any additional questions about why you are receiving this message, Google has provided more background information in a blog post about this subject.
Google Search Quality Team