The Final Table is a new location that was added for you to play at. It unlocks at level 30 but you can unlock this earlier in a multiplayer game.
Pre-acting is when you preset the action you are going to do before it is your turn to act. The action must actually occur for it to count, so if you tell it to check and someone bets before your turn you must choose an action again.
There are four rounds of betting in a full hand, so one round after your turn, someone must raise so that you can preset another action. This will unlock after the fifth time you perform an action you preset.
This can be earned in a single player game.