A "streak" refers to a continuous series of occurrences or actions without interruption. In various contexts, such as sports or gaming, it often signifies consecutive wins, points scored, or days of activity. For example, a player might have a winning streak if they win several games in a row. In the realm of social media and messaging apps, particularly with Snapchat, a streak indicates the number of consecutive days two users have exchanged messages. This feature encourages regular communication and can be seen as a fun way to maintain friendships, as users often strive to keep their streaks alive.