In everyday life, we typically represent numbers in base 10. The ones place (the digit farthest to the right in the number) represents the number of 1s in our number. The tens place represents the number of 10s in our number. The hundreds place represents the number of 100s, and so on. For example, the number represented by "123" is made of one 100, two 10s, and three 1s: 100 + 2x10 + 3x1 = 123.

Binary is a different system of counting and is the way computers take in, process, and store information. It's also referred to as base 2, since we need a new place for every multiple of 2 instead of each multiple of 10. In order to understand how computers work, and to make them work better for us in the future, it's useful to learn the binary number system.