Why is Yahoo Ad Monitoring reading my site?

Are you a webmaster looking for info about the “Yahoo Ad Monitoring” user-agent? We’ve got you covered.

What is Yahoo Ad Monitoring?

Yahoo Ad Monitoring is a page-fetch client that retrieves the landing page content of URLs that are listed with Yahoo advertising services. The landing page content is used to improve the accuracy of ad listings for the page, and the resulting user experience.

All landing pages are determined by the ads submitted to Yahoo: If multiple ads are submitted with each ad referencing a different landing page, the corresponding page is crawled in order to ensure policy compliance.

How does Yahoo Ad Monitoring identify itself?

Web site access for Ad Monitoring is identified by two "Monitoring" User-agents. The full user-agent values you'll see in your access logs are:

Desktop user agent

Mozilla/5.0 (compatible; Yahoo Ad Monitoring https://help.yahoo.com/kb/yahoo-ad-monitoring-SLN24857.html) <YahooInternalTag>

Mobile user agent

Mozilla/5.0 (iPhone; CPU iPhone OS 7_1 like Mac OS X) AppleWebKit (KHTML, like Gecko) Mobile (compatible; Yahoo Ad monitoring; https://help.yahoo.com/kb/yahoo-ad-monitoring-SLN24857.html) <YahooInternalTag>

<YahooInternalTag> is used for internal request tracking.