I took my car in to have the tires rotated. I began to notice a tap tap tap sound when the car is in motion

which I did not hear before. I called to bring the car in for them to take a look at it; they first asked when did I bring it in I said about a week 1/2 ago. The manager of the store said you are just now bring your car in.

Is it possible this tapping sound I hear has something to do with the rotation of my tire? Any suggestions as to what this could possibly be.