If you have the Facebook Like Box on your website, pay attention:
With the release of Graph API v2.3., the Like Box, a version of the Like Button for Facebook Pages that embeds a feed of content from a Page into a website, is being deprecated and will stop working on June 23, 2015.
Facebook is recommending that you switch to the new Page Plugin instead. The Page Plugin lets you easily embed and promote any Facebook Page on your website. Just like on Facebook, your visitors can like and share the Page without having to leave your site.
While the standard configuration of the Page Plugin includes only the header and a cover photo, which is ideal for promoting your Page in a small space, such as the top of a sidebar, you can customize it.