USB type determines the speed at which the data will be transferred from one device to another.It is very important to improve efficiency in work and save time. For example, USB 2.0 type has a speed of about 480 Mbps, USB 3.0 has a transfer speed of 5 Gbps and USB 3.1 has a speed of 10 Gbps. The lastest and the most powerful version, ThunderBolt 3 type, which is the latest version, has a speed of a whopping 40 Gbps.