Installing the WordPress plugin is quick and straightforward. After you have downloaded the archive with the plugin, you will see the file with the plugin inside. Unzipped purchased the product you will see inside the archive with the plugin pluginname.zip There are two ways to install it:
Installation of the Plugin through the WordPress Admin panel ( Recommended for most users )
Step 1
First of all, open WordPress admin area login page and login in into WordPress as Admin. To do this visit http://yoursitename/wp-admin
Step 2
Go to Plugins > Add New

Step 3
Click Upload Plugin Button

Step 5
Choose archive with Plugin and press Install Now Button
Step 6
After Installing go back to the Plugins page and click Activate below plugin title

Installation the plugin through FTP or build-in File manager
Step 1
Use Login and Password to connect to your web-server via FTP or use your hosting file manager. You can find out your username and password on the website of your hosting provider.
Step 2
Upload archive with plugin to /wp-content/plugins
Step 3
On next step Unzip the archive with the plugin
Step 4
Installing WordPress Plugin is almost finished. Go to the Plugins page and click Activate below plugin title.

After installing and activating the plugin, you can go to settings of the Plugin. Also, you can read more helpful articles about WordPress Themes and WordPress Plugins.
Two ways to update the plugin
When the plugin is already installed and you see a notification that a new update is available, you can use several ways to update the product.
First way
Go to the Plugins>Installed Plugins in the WordPress dashboard and press “update now” in the line notification next to the specific plugin.

Second way
Upload the plugin like during the initial installation following the steps specified above in the section Installation of the Plugin through the WordPress Admin panel or Installation the plugin through FTP or build-in File manager. In this case, all plugin files will be overwritten and updated.