Log into your WordPress Dashboard and navigate to the Plugins menu on the left-hand side and then click on Add New
Once the "Add Plugins" page populates you will want to use the search bar on the top right-hand side to search for the plugins you would like to install
Once oyu have found the plugin, click on Install and then the Activate buttons when you see them appear in the general information regarding the plugin.
Once you have installed and activated the plugin, please click on the Plugins menu on the left-hand side menu bar and click on Installed Plugins
Once you are able to view all the plugins you have installed on your site scroll down until you find your new plugin and click on Settings listed directly under the plugin name.
From here you can access the settings of the plugin for this plugin to function as needed on your site.
Once done, please make sure to save changes.