Yandex Search is a search engine. It is owned by Yandex, based in Russia. In January 2015, Yandex Search generated 51.2% of all of the search traffic in Russia according to LiveInternet.
Much like Google, Yandex offers free email, live traffic maps, music, videos, photo storage and much more. Many of these same features are some of the products that Google used to grow its adoption in all around the world by introducing users to the Google brand.