Internet speed is measured in bits per second and is used to show how much data can be moved from a server through the Internet to your computer every second.
Internet speed is expressed as “bits per second” or “megabits per second” (Mbps), or “gigabits per second” (Gbps).
One megabit equals 1 million bits, and one gigabit equals 1,000 megabits, or 1 billion bits. Megabit and gigabit are abbreviated with an uppercase “M” and “G” and a lowercase “b,” as in Mb and Gb.
For example, the eight-bit string of code 10010101 is exactly one byte.
Bytes are often used when referring to the size of an electronic file, such as music, photos and videos. One megabyte equals one million bytes. Megabyte is written with an uppercase "M" and an uppercase "B", as in MB. So, a photo might be 1MB, a song 5MB, and a video 700MB.