As first reported by AllThingsD, Yahoo has announced an advertising partnership with Google, not unlike working relationships it has with other companies. Yahoo in its current form has quite a few pages for advertising display and it makes sense that its CEO of less than a year, Marissa Mayer, would call on her former colleagues in Mountain View to fill those spots with Google’s contextual ad units.

As we navigate the web, both on desktop and mobile, we’re used to seeing Google’s display ads, and they do very well. Mayer has insight into how those ads perform, so this is basically a no-brainer for Yahoo. Mayer was employee No. 20 at Google, and has been able to see its Ad product mature over the years.