How to Play
The goal of Bridge is to be the team at the end of the match with the most total points. The match (called a rubber) ends when a team wins 2 games. A game is won by getting a "contract" score of 100 or more points over several deals if necessary.
Goals of Bidding
At the beginning of a deal, you must state the number of "tricks" you think your team can win with a specific "trump suit". A bid includes a number (1-7) and a trump suit (or no trump, NT). The team that makes the final bid must win at least that number of tricks plus 6. The final highest bid is known as the "contract".
Each player can either bid or pass when it's their turn. Alternately, each player could double their opponents' most recent bid. The opponents' team can then redouble the bid. Under double or redouble, that game rewards double or quadruple points respectively. The bidding ends when 3 players in a row pass. The player that makes the first bid of the trump suit is called the "declarer".
The player to the declarer's left chooses a card from their hand to lead the first trick. After that, the declarer's partner's hand is placed on the table (called the "dummy hand") and is played by the declarer for the remainder of the deal.
Each player must follow the suit of the lead if they are able, otherwise, they can play any other suit, including the trump. The trick is won by the highest trump, or if no trumps were played by the highest card of the lead suit. The winner of each trick leads the next trick.