How to install plugins

Note! - After installing a plugin they can add UI (user interface) anywhere in the admin panel.

Go to Plugins - Add New
Type in the name(if you're looking for a specific one) or a keyword and click Search Plugins
Choose one and click Install Now
The last step is to activate it. Click Activate Plugin.
The plugin is now showing in the Plugins - Installed Plugins section. You can easily Deactivate(stop running) or Delete(this option shows up after deactivation) it.
The physical files of the plugin are located in the wp-content\plugins\nameofplugin folder.