Yandex, Russia’s biggest search engine has not only just signed a real-time search deal with Twitter but has also released its results for Q4-2011 showing over 50% growth in sales and profits year-on-year. Yandex’s share of Russian search now stands at 60.8% and they’re planning for more growth with an aggressive move into mobile.

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 SERPs pages served were up 36% and number of advertisers increased by 43%. More details here.