Hi @wataru,
Welcome to Microsoft Q&A forum.
Thank you for reaching out. I understand you have concerns about unintended images appearing as thumbnails for your website in Bing search results, even though you have correctly specified images using OGP tags and structured data.
I have outlined the answers to your questions below. Please feel free to reach out if you have any further concerns or require clarification on these points.
1. Are thumbnails automatically selected by Bing?
Yes. Thumbnail images displayed in Bing search results are selected by Bing’s algorithm. While Open Graph (OGP) tags and structured data are important signals, they are treated as strong recommendations rather than strict directives. Bing’s primary goal is to show the image most relevant to the user’s query.
2. Why might the specified image not appear?
While OGP tags and structured data are important signals, the algorithm also considers several other factors beyond these tags. These include query relevance (how well the image matches the user’s search intent), image quality (its resolution, clarity, and suitability for display), and page context (where the image is placed and its relationship to the main content). Because Bing's primary goal is to optimize for the user's experience, the image you specify may be replaced if another image on the page is deemed more relevant to the query.
3. Where can I find official guidance?
For detailed information, please refer to these official resources:
- Bing Webmaster Guidelines
- How Bing Delivers Search Results
- Bing Webmaster Tools Help & How-To Center
For any persistent, site-specific concerns, we highly recommend using the Bing Webmaster Help Center. This is the official channel for personalized assistance, and it is the great place to get the most correct and up-to-date information directly from our technical team.
Please let me know if you would like additional details about how Bing Web Search API handles thumbnails or if you have any other questions.