WP Internal Links Lite allows you to easily create powerful internal linking structures and improve your on-site SEO with a few clicks of a button.
Install the plugin by either:
wp-inter-links-lite.zip to the
/wp-content/plugins/ directory of yur site via FTP.
b) Using the built-in "Add new" functionality in the WordPress "Plugins" admin menu, searching for "WP Internal Links Lite", and clicking on "install" on its listing.
Activate the plugin through the 'Plugins' menu in WordPress.
And that's it! Go through the tutorial videos recommended in the plugin's main screen to learn how to use it to its maximum potential!