Plugins are tools which provide more functionality to your website. To install WordPress plugin you generally just need to put the plugin file into your ‘wp-content/plugins’ directory. Once a plugin is installed, you may activate it or deactivate it from the Plugins menu in your WP admin.
Step 1 – For this you login your WordPress admin panel, and go to Plugins.
Step 2 – click on add new plugin and then you find all listed WordPres plugin , and you can select and search plugin and click on to the link install.
Step 3 – if you have zip file of downloaded plugin then you go to upload link and choose your plugin from local directory then press Install button.