a lot of it depends on conditions and your rig, watch the line about the top eye if possible and try to identify if it is fish at the bait or line bites. Back in the 70s we went through a twitch hitting period, alleged when particure and mass baits were in heavy usage, "bleep smack" they would go as the bobbin hit the rod, we would sit over them like gun fighters, a rod at each side and hit everything that moved and it payed off often a tiny bleep would be converted into a fish on the bank. This however was in a period prior to bolt rigs and hairs so you need to be aware of what was actually happening at the time, which may be entirely different than what is happening today.