How well do you think players follow what's going on in an adventure path? Running games, I feel like most players are clueless to why their characters are there and what they are suppose to be doing. No matter what I do. Session logs, "previously on" right before the session, etc. I am also a player in two other games and I am part of the "lost players" group. That is with two different GMs. So 3 game masters, 3 different styles of running a game. 3 different groups of players all lost as to what is going on for the most part.
How common of a problem is this and how do you fix it?