By default the button targets the current page URL and title. You can have the button target a different page URL and title.

var a2a_config = a2a_config || {};
a2a_config.linkname = "Example Page Title";
a2a_config.linkurl = "http://www.example.com/";

Tip: For dynamic/AJAX sites and pages with named anchors, you can leave these values unset and AddToAny will share the current page URL including the current hash.