Plugins are a small add-on that does a specific job. It is a collection of PHP files that has some functions.
Plugins are developed and released on the WordPress.org site and with the WordPress software, we can search and install those plugins on our site.
plugins are a small piece of a program that helps to perform a specific task.
Once you install the plugin you can update, uninstall, delete the plugin from the WordPress dashboard.
only admin can install or delete a plugin on your site.
Most famous plugins are used to:
Increase Site SpeedSite AnalyticsStop the spam CommentsSecure your site from Virus AttacksAdd Contact Form to your siteReduce Media SizeBackup your site
Some Important plugins