Sharing On Facebook

Whenever you share things to WordPress, Facebook caches your images on their servers and CDN (read more here on what is a CDN and how it works). You can think of this the same way caching works on your site, sometimes you have to clear the cache to get things working again. The same sometimes goes for Facebook. If you make updates on your site, Facebook might still show an old image when you go to share it, this is because it doesn’t fetch new information, but rather serves up the information it already has cached.

The same goes for information about your link and content itself. They fetch what they call Open Graph Meta Tags. According to Facebook, the Open Graph protocol enables any web page to become a rich object in a social graph. Basically, these are tags (code) that tells Facebook info about what you are sharing.

Not sure if you are using Open Graph Meta Tags on your site? Well, you probably are, you just might not know it. 😉 If you are using popular plugins like Yoast SEO or Social Warfare, these in fact automatically add these tags for you behind the scenes.

Let’s take our website speed optimization guide as an example. If we look at the source code of that post, we can see the following data regarding Open Graph. Note: Open Graph uses different attributes, such as og:title and the one we really care about for this tutorial, which is og:image. This is the code on our site that Facebook looks at to determine which featured image, title, and description to show.

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