Integration is a way for your POS (Point of Sale) system or Cash Register to talk to the EFTPOS machine.
POS integration is great because it makes payments quick and easy and helps to increase accuracy and reduce human error caused by manually entering amounts.
There are many different integration solutions. Usually this choice will be influenced by the POS or cash register that you use or are planning on using. Most solutions can be classed as a one-way interface, two-way interface or full integration and will provide different functionality accordingly.