Modify shared item’s title, description & title appear on Facebook
Thousands of websites are shared in facebook each day. Whenever you share a URL on facebook, it generates a feed against that url. The feed has a title, an excerpt or description and an image.
You can enhance how the shared item appears on Facebook by configuring how it gets previewed on a user’s profile and when a user tries to share it.You do this with <meta> tags. If there are no meta tags specified then Facebook share will take the site title, starting content of the site as excerpt and usually the first image shown.
In order to customize how your site looks while being shared on facebook you need to add meta tags in the <head> of your page.
FaceBook: How to clear Facebook Share’s Cache?
Facebook share is good, simple, lets us share almost everything on web in seconds. But Facebook caches already shared urls/pages for better performance. This causes issues at time when we update the title, picture being shared or the description of the page because Facebook still shows the older version of the page.
For modifying which image, title and description FB chooses, read this
I will discuss three simple ways to force facebook to go and fetch the latest stuff from the page being shared.
With all the changes that Facebook is making, it’s more important than ever to get your application settings correct in order to get your fan page working correctly or ensure that your Facebook social plugins work just right.