Yahoo Gemini
Yahoo Gemini is an advertising-platform crawler operated by Yahoo. It fetches landing pages to verify quality, policy compliance, and creative assets for the ads being served on the platform.
Blocking it almost always breaks ad serving on the affected URLs. If you advertise on this network, you need to allow this crawler.
If you are not running ads on this platform, the traffic should be modest. If it is heavy, check whether someone else is running ads pointed at your URLs.
See Yahoo Gemini on your own site
Match the User-Agent header on incoming requests against the pattern below.
regex
For higher confidence, also verify the source IP against the operator's published ranges. UA strings can be spoofed; IP ownership is harder to fake.
Renders JavaScript
No
IP verification
User-Agent only
Crawl frequency
Variable
Honors robots.txt
Yes
Honors Crawl-delay
Varies
Yahoo runs 16 bots in total. Each one is a separate user-agent so you can allow or block them independently.
Link Unfurler
7Brand Intelligence
2SEO Crawler
1Ads Network Bot
1- Yahoo GeminiYou are here
Should I let Yahoo Gemini through?
In most cases, yes. Required for ad serving and brand safety. Blocking causes fill-rate and revenue drops. If volume gets noisy, rate-limit it before you block it outright.
Does blocking Yahoo Gemini affect my Google rankings?
No. Yahoo Gemini is not a search-engine crawler. Your ranking on Google or Bing is unaffected by what you do here.
How do I confirm a request is really from Yahoo Gemini?
Look at the User-Agent header in your access logs and match it against the strings listed above. Worth knowing that the User-Agent is easy to fake, so this check tells you "the traffic claims to be Yahoo Gemini", not "the traffic is genuinely Yahoo Gemini". If you need stronger guarantees, look for a reverse-DNS check or wait for Yahoo to publish IP ranges.
What's the best way to understand what Yahoo Gemini is doing on my site?
Look at which URLs it hits, how often, and what time of day. The request pattern usually tells you whether it's building an index, watching for a specific change, or trying to pull data in bulk. The User-Agent name alone rarely tells the full story.
How is Yahoo Gemini different from Yahoo's other bots?
Yahoo splits work across multiple user-agents so site owners can decide on each one independently. Training crawlers, live-fetch agents, search indexers, and agentic browsers each get their own name. Worth scanning the rest of the Yahoo family above to see which ones actually matter for your site.
What's the cleanest way to control Yahoo Gemini?
Two layers. Robots.txt for the polite crawlers that read it, and rules at your CDN or edge for the ones that don't. Rankly's Agent Experience handles both from a single config, so you can allow, block, rate-limit, or serve a stripped-down version per bot. Agent Analytics handles the observation half so you know which bots are actually worth a rule.