Help:Google +1 Button
By enabling this feature you make use of a so called social plugin ("plugin") named "Google +1 Button" from the social network "Google+" ("Google+" or "Google") (http://plus.google.com), which is operated by Google Inc., 1600 Amphitheatre Parkway, Mountain View, CA 94043, USA ("Google"). This plugin is indicated by the Google +1 Button logo identical to or similar to these: http://static.mixesdb.com/images/misc/Google_+1_sprite_2.png.
When you have this plugin enabled and access a MixesDB content page, your browser establishes a direct connection with the Google servers. The content of the plugin is transferred by Google directly to your browser, which then integrates it into the website. Integration of the plugin causes Google to receive the information that you have accessed the corresponding page on MixesDB. If you are logged in with your Google+ account (and possibly any other account of the Google services) ("Google account"), it will be able to assign your visit to your Google account.
Please note that an exchange of this information may take place, regardless of whether you interact with the plugin or not. Google may also collect such data anonymously (IP based) if you are not logged in to any Google service.
If you do not want Google to gather data about you via MixesDB or if you think your data privacy is harmed by this plugin, disable it or do not enable it in your user preferences.