Wins have the objective of winning a certain number of games. For example, Win 2 Games requires that two games be won to have completed the Quest. There is no time limit in which to do so, and the wins do not have to be consecutive. As long as you complete the objective, you will be awarded the Coins. The Quest card will state in advance how many Coins will be awarded for achieving this.
Streak Quests have the objective to win a certain amount of games, but in this case the games must be won consecutively. For example, a 3 Win Streak requires that the three wins are all achieved in a row with no losses in between.
Beat the Clock requires players to complete the Quest objectives in a certain time period. For example, Win three games within 30 minutes. The clock will start as soon as the PlayVIG app recognizes that the game has started and will stop when the result of the game is recognized. The game length for each attempt is added together at the end to determine whether the objective was achieved, and thus whether the Quest was won or not.