Yandex is the most popular search engine ever. With its market share is around 62% It is a power in Poland, Ukraine, Kazakhstan, Belarus and Turkey. Google is still a power in Russia, but if you advertise or sell in Russia you should first optimize for Yandex, then for Google.
Yandex has many requirements that differ from other search engines. This aspect makes Yandex one of the most popular search engines with which to optimize because it is different than the material from which the SEO professionals tend to work every day. (more…)