Solution: Google Webmaster Tools

In order to register your eZ Publish website in Google Webmaster Tools, you need to verify you are the owner of the site. One possibility, and in case of eZ Publish the easiest, is adding an additional HTML meta header to your web pages.

You can add the verification code you get from Google Webmaster tools, In the site.ini.append.php file

• either as a global override (settings/override/site.ini.append.php)
• or just for specific site accesses (settings/siteaccess/[yoursiteaccessname]/site.ini.append.php)

[SiteSettings]
MetaDataArray[verify-v1]=yourgooglewebmastertoolscode