- Items were recently submitted
After your items are processed, there's a delay before our server caches your images. During this period, we'll display an "image not available" message for your items. - Images are in an unsupported format
Please make sure that your images are in one of our supported formats and their filenames include the appropriate extensions. In addition, to successfully process an image, its associated URL must link to an image file rather than to a script. - A robots.txt file is on your server
This prevents us from crawling the images on your site. In order for us to access these images, please modify your robots.txt file to allow the user-agent "Googlebot" to crawl your site. You can do this by adding the following two lines to your file: - Images redirect
An image link should link directly to an image. If the image link in your data feed redirects to another URL of the image, we won't be able to grab a copy of your image to add to search results. Image URLs that redirect through ASP, PHP, or Cold Fusion scripts will also fail to be cached. - Images have HTTP headers
Every time information is passed through the Internet, it's preceded by a short description generally called a header. If the header information for an image isn't what's expected, the image processor is unable to cache a copy of your image. Typically, headers may only be an issue for images that are dynamically generated. If you don't know if your images are dynamically generated, this most likely isn't the problem.
Two header fields that must be passed are content-type and content-length. The content-type describes the file type you're sending. Two common values for images are "image/gif" and "image/jpeg." The content-length lets us know the file size for an image. A header field that shouldn't be passed is "cache-control." If you choose to add header fields, please make sure they're appropriate for the image. - Image size is too large
It's best to include images that are 400x400 pixels or a bit larger. This image size allows us to include a non-distorted image in search results and reduces the possibility of overwhelming your server by requesting much larger images.
User-agent: Googlebot
Disallow:
Learn more about the Robots Exclusion Protocol.