Home › Support › Simple Aweber Optin Widget › Can we use it in a Page or Post?
Yes you can use this plugin in a post/page too.
First you need to install the Widget Shortcode plugin. https://wordpress.org/plugins/widget-shortcode/
This plugin will add a unique shortcode at the end of each widget like this http://screencast.com/t/1s7iIQG0A
Grab that code and put on any page or post and the widget will show up there.