Hi Munir,
Are they increasing? If not you can clear them and monitor moving forward. As EtherMAN mentioned you ideally want the packet drops to be at zero but sometimes these counters will increase overtime and typically not an amount that is detrimental to the network. They almost always increase because of over utilizing bandwidth on a port. Hitting the "0" (Zero) key while the output is present will clear all the counters.
Hope this helps.