Facebook social plugins refer to a set of interactive tools and features that can be integrated into external websites, allowing users to connect and engage with Facebook content and their friends without leaving the site. These plugins include the iconic ‘Like’ button, ‘Share’ button, and ‘Comment’ box, as well as other customizable options such as the ‘Follow’ button and embedded posts. By incorporating these plugins, website owners can enhance their online presence and encourage social interactions, while users can easily share and discover content across the web.