Plugin Installation and Use Instructions
Download the plugin file
Unzip the file into a folder on your hard drive
Upload the /ad-widget/ folder to /wp-content/plugins/ folder on your site
Visit Network Admin -> Plugins and Network Activate it there.
the plugin does not show up in my admin if I install this way.
And if I install directly through WP admin (like all other third party plugins) it doesnt show up in my wp-content/plugins folder