What is cross domain tracking?

Google Analytics may follow a visitor as a continuous session across two or more linked websites by using a technique called cross-domain tracking. If you track www.sitea.com and www.siteb.com under the same GA Web Property, for instance.

• A feature of Google Analytics called cross-domain measurement enables you to view sessions from related websites as a single session rather than two separate ones (for example, an e-commerce website and a different shopping cart website).