What is Open Graph and how can I use it for my website?

Luckily, our favorite social networks also provide tools to help us debug our tags. Once you make sure that your tags are actually showing up in the source code of your website, you’ll be able to preview how your website will look in the feed.

Twitter: https://cards-dev.twitter.com/validator
Facebook: https://developers.facebook.com/tools/debug/
Pinterest: https://developers.pinterest.com/tools/url-debugger/