A plugin is a piece of software containing a group of functions that can be added to a WordPress website. They can extend functionality or add new features to your WordPress websites. WordPress plugins are written in the PHP programming language and integrate seamlessly with WordPress. In the WordPress community, there is a saying that goes around: “there’s a plugin for that”. They makes it easy for users to add features to their website without knowing a single line of code. There are thousands available for free to download at the official WordPress plugin directory. At WPBeginner, we write about all the best WordPress plugins. We have even shared a list of all the plugins we use. Aside from free plugins, there are tons of amazing commercial ones available from third-party companies and developers.