Crab Nebula- The Essential Meta Tags for Social Media (css-tricks.com)
These days, almost every website encourages visitors to share its pages on social media. […] When users choose to share these links, it is tasked to the web developer to make sure that the associated web pages are properly prepared, which is what we’ll look at now. Facebook and Twitter are, by far, the most popular social media platforms, so let’s focus on those two.
- The Open Graph protocol (ogp.me)
The Open Graph protocol enables any web page to become a rich object in a social graph. For instance, this is used on Facebook to allow any web page to have the same functionality as any other object on Facebook.