Hero opens with TT from BU, SB 3-Bets and hero calls. SB c-bets on 877r and hero calls. The turn is a 7 and SB checks. Vs what player types or player tendencies are you betting and when are you checking?

I sometimes have trouble knowing when to check SDV hands and when to bet. When is it ok to bet for protection with a hand that is vulnerable to being outdrawn but won't get called by second best?