WordPress plugins help you to extend the functionality of your website. They are little applications that plug into WordPress.
For example, if you have enabled comments on your website then you can activate the Akismet plugin. This plugin will help you to prevent spam on your website. Just click on “Plugins” in the dashboard and you will see it listed. Akismet is included in the default installation of WordPress. If you are allowing registration on your site you may also want to install and activate the WangGuard plugin.