# YandexAdditionalBot

YandexAdditionalBot is a supplementary web crawler from the Russian search engine Yandex. It works alongside the main YandexBot to gather additional information from websites. Its purpose is to support and enhance Yandex's search index by collecting specific types of data, verifying content changes, or performing other specialized crawling tasks. Its presence is part of the normal operation of the Yandex search engine.

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## What is YandexAdditionalBot?

YandexAdditionalBot is a specialized web crawler from Yandex that performs additional crawling tasks to enhance its search and web services. It identifies itself in server logs with the user-agent string `Mozilla/5.0 (compatible; YandexAdditionalBot/3.0; +http://yandex.com/bots)`. As a supplementary crawler to the main YandexBot, it may focus on specific types of content or perform specialized analysis.


## Why is YandexAdditionalBot crawling my site?

YandexAdditionalBot is visiting your website to collect information that complements the data gathered by Yandex's primary crawlers. The frequency of visits depends on factors like your site's popularity and content update schedule. This is an authorized and standard activity for a major search engine.


## What is the purpose of YandexAdditionalBot?

The purpose of YandexAdditionalBot is to support the Yandex search engine by gathering specialized or supplementary information. This helps Yandex improve its search results and provide more comprehensive information to its users. For website owners, having your content crawled by all of Yandex's bots can increase your visibility in their search results, which is particularly valuable for reaching audiences in Russia and other countries where Yandex has a significant market share.


## How do I block YandexAdditionalBot?

To prevent YandexAdditionalBot from accessing your website, you can add a specific disallow rule to your `robots.txt` file. This is the standard method for managing crawler access.

To block this bot, add the following lines to your `robots.txt` file:

```
User-agent: YandexAdditionalBot
Disallow: /
```


## Related agents and operators


## Canonical

Human friendly, reader version of this article is available at [YandexAdditionalBot](https://plainsignal.com/agents/yandexadditionalbot)

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