Yahoo shares an advertising network with Bing. It boasts the same features as Bing including lower competitors and a different audience. Since they are different search engines, it allows for increased exposure to your company and website.
However, Yahoo also has its own advertising system. Yahoo Advertising sets itself apart from its competitors with a more attention-grabbing approach. Yahoo Advertising allows for a full native display of your website instead of just text and a link. It also has additional features not found in other search engine advertisements such as contributor networks and mobile search options.