Webmaster Tools Verification
Search engines (and other websites) usually require verification of the website ownership. To verify ownership you have different methods, and one of them is using meta ID value. This method requires you to add META HTML tag to your website home page.
If you can’t (or won’t) modify theme source file to add this tag, you can use this handy feature in GD SEO Toolbox Pro, and add meta ID’s for each webmaster tools you want verified, as on the image on the right.