So this is like, just the real basic stuff. I only had time for a coupla quick snaps to use for this not-quite-tutorial, so please expect nothing fancy or intricate.
In layman’s terms, shutter speed is the duration of time that the shutter is open once you click the camera. This is usually measured in seconds or increments of seconds like 1/x seconds. The longer the shutter remains open, the more light enters the image sensor. To better demonstrate, take a look at the following photos. They are all set at f/5.6 and ISO of 1600 and not edited save for putting the labels. The only difference is the shutter speed: