Facebook entered a partnership Tuesday with the Russian search engine Yandex that will allow Yandex to index public Facebook data in the countries it serves and use them as search results. In exchange, Yandex will deliver traffic to Facebook.

While Facebook and Google dominate their respective categories in the US, Russia has its own favorite social network (VKontakte) and search engine (Yandex). According to Quartz, VKontakte has over 100 million active users, more than Facebook has in the country, though Russians on Facebook tend to be more affluent and urban. Yandex, like Google, is not only a search engine but an array of services and is similarly integral to the way Russians use the Internet.

Starting Tuesday, Yandex will start using Facebook’s data in two ways. First, it will take “public” posts and comments from users in Russia, Ukraine, Belarus, Kazakhstan, other CIS countries, and Turkey and display them as search results for relevant queries. Second, on the back end, Yandex will take data from Facebook, like posts that have “resonance,” and use that to augment its search result rankings.

No money is changing hands, meaning that Facebook expects to benefit from Yandex’s use of its data in the form of more traffic to the site. Yandex’s use of this type of information as search results is not new; per the company’s blog post, it already uses tweets, posts from LiveJournal, and info from VKontakte in a similar way.

Russian Facebook users who were not expecting to have their posts turned into search results will be able to opt out, as Yandex assures that private posts and information will remain off limits. It’s difficult to retroactively change or delete Facebook posts, though. The usage is somewhat reminiscent of Google starting to include user ratings and reviews in its sponsored search results, but without the advertising relationship.