Because “bits” of data are very small, speed is usually measured in megabits, or millions of bits, per second (Mbps). Some superfast fiber services can send data at a gigabit per second (Gbps, or a billion bits per second).Īlmost any internet speed is fine for receiving a text-only email, and you may need only 1 Mbps to listen to a Spotify song. The term refers to how fast data-say, a Netflix movie-travels into your home.