What is a megabit? Is 1 million binary pulses. Megabits are used to measure the amount of data per second transferred between to telecommunication points. If you look at your wireless internet connection, you will see numbers such as 54mbps which translates into 54 megabits per second. That is the speed information is being sent and received through the modum via the wireless connection. To sum it up it is simply the measuring speed from one device to another in seconds.