YandexBot
The crawler for Yandex, the dominant search engine in Russia and several neighboring markets.
YandexBot/3.0; +http://yandex.com/botsOfficial documentation: yandex.com
What YandexBot does
YandexBot indexes for Yandex Search. It is thoroughly documented, supports fine-grained robots directives, and is verifiable. Volume on Western sites is usually moderate.
Why it visits your site
Standard search indexing.
The bigger picture: search engine crawlers
Search crawlers remain the one category with a decades-old, well-understood bargain: they consume crawl budget and return ranked visibility. Everything about them is comparatively mature - published IP ranges, verification methods, granular directives, webmaster consoles. Blocking them is almost always self-harm, which is precisely why they need to be cleanly separated from AI crawlers in your data: a blanket bot block that catches Googlebot costs you your organic channel.
The complication the AI era added is that search indexes now feed AI features too - AI Overviews draw on Google's index, Copilot on Bing's. Operators have answered with control tokens that split AI use from search use of the same crawl. The practical upshot: your lever for AI concerns is usually a token, not a block on the search crawler itself.
Should you block it?
Keep it if any of your audience searches on Yandex; block it only if you have no interest in those markets and want the crawl volume gone.
Block via robots.txt
Add these lines to the robots.txt at your site root to ask YandexBot to stay away:
User-agent: YandexBot Disallow: /
Remember that robots.txt is a request, not a lock - compliance is voluntary, and enforcement happens at the server. Viz's AI Control pairs robots.txt rules with server-level 403 responses and then probes your site to verify the block is actually holding.
How to see YandexBot traffic on your site
You have three windows onto it, each with a catch. Raw hosting access logs contain every YandexBot request, but many managed WordPress hosts don't expose them, and when they do you are grepping text files by hand. A CDN dashboard sees the traffic at the edge, but it lives outside WordPress and speaks in totals, not in your site's terms. And JavaScript analytics - GA4 and friends - will never show it at all, because YandexBot doesn't run scripts.
Viz's answer is the request log: filter to YandexBot and read exactly which URLs it fetched and when, right inside wp-admin - then watch the same filter after any blocking decision to see whether the visits stopped, slowed, or kept coming.