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. As a site administrator, you can install/uninstall plugins from the admin
area. You can also download and manually install them using an FTP client.They make it easier for users to add features to their website without knowing a single line of code.