In order to install a WP Plugin for PushnotiAds publishers, download the zip file here (https://pushnoti.ams3.cdn.digitaloceanspaces.com/wp/pushnoti_service.zip)
Go to Plugins -> Add New -> Upload Plugin -> Choose the zip file you just downloaded and install it.
Activate the Plugin
Go to settings and enter the Client ID and APP ID from the Instructions screen in publishers.pushnotiads.com Dashboard.