Thumbnail images have a huge impact on the amount of clicks a post will receive on Facebook. Controlling the image that shows up when people share a page on your website is important. So how do you choose the image? Glad you asked…
If you use Worpress you can install a plugin called “Easy Facebook Share Thumbnails“. It uses the ‘featured image‘ for each post as your Facebook thumbnail and allows you to choose a default thumbnail for any page or post that doesn’t have one specified.
If you’re not using wordpress you can choose your thumbnail by inserting this code between the
</head> tags. Just replace “url to image” with the url to the image you want to use – i.e. “http://mysite.com/images/myimage.jpg”:
<meta property="og:image" content="url to image" />
One important thing to note is that Facebook will store the thumbnail for a particular page or post on your site in their cache if it’s shared. This can be frustrating if you didn’t specify your thumbnail ahead of time and end up with one you don’t like. Fortunately there’s a little trick that allows you to re-set it. Just go here: http://developers.facebook.com/tools/debug and enter in the URL of the page or post you want to re-set. Once you send it through the de-bugger your thumbnail will automatically be re-set.