Rearwheel/Freewheel clicking ?

I have a question if I should be worried about this? The clicking noise in the freewheel suddenly got quieter during my last ride. Sorry for the lack of correct usage of terms but I really know very little about bikes. Anyway, I am referring to the clicking noise when the freewheel is not in use but the wheel is spinning, like when you are pushing your bike. The clicking is still audible & seems to be the same cadence just not as loud. Is this indicating a problem or something I do not need to be concerned about? Thanks.