Bandwidth refers to the amount of data that can be transmitted over an internet connection in a given amount of time, typically measured in bits per second (bps). Think of it like a water pipe - the larger the pipe (i.e. higher bandwidth), the more water (i.e. data) that can flow through it at once.

Having a high bandwidth connection means that you can transfer large amounts of data quickly, which is important for activities like streaming videos or downloading large files. On the other hand, a low bandwidth connection may result in slower loading times and lower quality video or audio.

It's worth noting that bandwidth can be affected by a variety of factors, including the type of internet connection you have, the number of devices using the connection, and the quality of the connection itself.