Facebook tell the image to be placed when someone click on the button like me.
By default, when we like on a page, facebook it collects information from the code itself, such as title, then paint it in the user profile. Typically, the title and name of the site are things that usually get pretty good. But there are others such as the associated image, which often does not work so well.
If you have multiple images on the page, we have no control over which of them painted. And with the description of something similar could happen to us if we do not put the target description in the header of the web, catch the first paragraph thereof, which may have little to do with what we share.
To avoid such problems, facebook offers OpenGraph protocol. This protocol defines a set of meta tags by which we can give additional information on our facebook page, such as product name, description, image or name associated with the site. Thus, we can control how it displays information about our product within facebook.