When do customers get sent to internal reviews and when do they go pushed to our review sites?

By default a 3 star and below reviews will be sent to an internal review, 4 and 5 star reviews will be pushed to 3^rd party review sites (Google+ for example). This is customizable to your wants and needs though. If you wish to make the internal review threshold higher or lower you can edit this under the “Reviews” tab on the site. There is a button found on the right called “Review Settings” that will allow to change this setting.