Exemple : we are on btn with 86 we open , big blind call.

Flop KT6

Is it better to Cbet ? or check back ?

Against a standart reg lets say he is 24/20 , average fold to cbet 50% , defend by calling in bb 50 %.

What are the most important factors to prefer a cbet rather than a check back ? or a checkback rather than a cbet ?