Your shutter speed controls how fast or how slow the shutter door opens and closes in front of the image sensor in your camera.
A faster shutter speeds will freeze action whereas a slower speeds create a blurred effect. When you set your shutter speed on your camera, you’ll see numbers 60, 125, 250, 500, 1000 and so on. These actually represent 1/60th of a second, 1/250thof a second and so on. The higher the number say 1000, the faster the shutter speed and the smaller the number like 15, the slower the shutter speed.
I suggest using a tripod for speeds lower than 1/60th of a second unless you want a blurry image which sometimes is a really cool effect. Fast-moving objects will need a faster shutter speed, around 1/500 of a second or higher, in order to freeze the subject in action.
Your shutter speed is all about controlling action or movement in your image.