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POPSInside Facebook, NFO (News Feed Optimization) is the new SEOJuly 16th, 2007
The title is required, and is limited to 60 displayed characters (excluding tags). The a tag is allowed, and there can be zero or one instance in the title. One fb:userlink tag is allowed, and the uid parameter must be populated with the user id on whose behalf the action is being published. If there is no such fb:userlink tag found, then one is automatically prepended to the title. The fb:name tag is allowed, and there may be multiple instances of this tag. No other tags are allowed. The body is optional, is limited to 200 displayed characters (excluding tags), and can include the tags fb:userlink, fb:name, a, b, and i. Up to 4 images can be displayed, which will be shrunk to fit within 75×75, cached, and formatted by Facebook. Images can either be a URL, or a facebook PID. If it is a URL, you must own the image and grant Facebook the permission to cache it. Each image must have a link associated with it, which must start with http://