What the heck is Yandex, you might ask? Yandex is the search engine for Russia. So what use is it to get into Yandex for local, United States (UK, Australia, etc.) searches?
And the obvious answer is: It isn’t. But it is. Confused yet?
Remember, Google ranks web sites on many things and one of the most important is how many other web sites link to yours. But not only that. Google also cares how much of a good reputation the web site has that is linking to yours.
For instance, let’s say your web site has a link to it from a blog. But that blog also links to 10,000 other web sites (that’s called a link farm). Google may rank that site a 0 out of 10 (luckily Google doesn’t rank below 0).
Compare that to Yandex: Google ranks Yandex a 10 out of 10.
All that to say that having your web site listed in Yandex helps you rank better in other search engines.