Bing Preview is a specialized web crawler developed and operated by Microsoft. Its primary function is to fetch and render web pages in order to generate accurate previews, such as thumbnails or content snippets, that appear in Bing search results and other Microsoft services. Unlike general-purpose crawlers that index content for search ranking, Bing Preview focuses on retrieving the visual and structural representation of a page as it would appear to users. This enables Bing to provide users with richer, more informative search result displays. The crawler identifies itself with the user agent 'bingpreview' and typically respects standard robots.txt directives.
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Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/534+ (KHTML, like Gecko) BingPreview/1.0b