The terms 'PUSH' and 'PULL' refer to the the type of connection the channel has with Rentals United.
A PUSH channel relies on Rentals United pushing certain property information to the sales channel ranging from just rates and availability (Booking.com, Expedia, Agoda when manually mapped in RU) to all proeprty information including static data (photos, descriptions etc).
Here is a list of all PUSH channels:
A PULL channel extracts all property information from Rentals United once the property has been activated and displays it on their site without you having to make an account.
Here is a list of all PULL channels: