What is a Search Engine Yandex?

Yandex - Russia's largest search engine. Handles (various sources) from 60% to 80% of all Russian-language search queries. Pays special attention to thematic links (non-thematic external links also have an effect, but to a lesser extent than other search engines). Indexing is slower than Google, but also the appropriate time. Decreases in the ranking or exclude from the index sites dealing with non-thematic ssylkoobmenom (containing non-thematic directories of links that are created only to improve your site's ranking), as well as sites that participate in automated link exchange. In periods of database updates that last few days, giving Yandex is constantly changing, in such periods should abandon any works on the site and wait for stable performance search engine.