Free digital TV services like FreeView don’t require a satellite dish – all you need for these basic TV packages is a set-top box.
However, digital satellite TV services such as Sky do require a dish on your home.
The dish is there to receive digital signals, which are then sent to a set-top box which decodes the signal. The set-top box then sends its information into a digital-ready TV.
Installing a dish requires an expert, but this will be taken care of by your digital TV provider. There are different types of dishes, and different places where the dishes can be placed (such as the roof or side of your house). Your installer will advise you on the best approach.