YANDEXBOT

YandexBot is the web crawler for Yandex, the largest search engine in Russia with significant market share across Russian-speaking countries. YandexBot indexes web content for Yandex Search, Yandex Images, Yandex Video, and Yandex's AI assistant Alice. It is one of the older and more established search engine crawlers still in active operation.

YandexBot is notable for supporting several unique robots.txt directives that other search engines don't implement, including the Clean-param directive (which helps handle URL parameters) and the Host directive (for specifying preferred domain versions). Yandex provides comprehensive webmaster tools and detailed documentation about its crawler's behavior.

NORAD.io tracks YandexBot activity globally, noting that its crawl patterns are particularly important for sites targeting Russian-speaking audiences. Even for sites outside this market, YandexBot activity is a useful signal — unexpected YandexBot crawling of typically non-Russian content can sometimes indicate indexing anomalies or crawler behavior worth investigating.