Multi point touch screens sense multiple points of contact on the tablet PC allowing for better accuracy and the zooming option. The more points the better the response from the LCD screen. Most tablets come in a range of multi touch depending on the price. The most basic is a 2 point touch. Other common multi touch screens are 5 point touch and 10 point touch(used in the iPad 2 for example). These give the user far better accuracy and response.
iMac Pro review