Top prop bets, or proposition bets, are wagers placed on specific outcomes within a game that aren't directly tied to the final score. These can include player performance metrics, such as total points scored, assists, or rebounds in basketball, as well as unique events like the first team to score or the number of fouls in a game. Prop bets add excitement and engagement for fans, allowing them to focus on individual performances and game dynamics, making them a popular choice among sports bettors looking for diverse betting opportunities.