90 Day Fiancé is a reality TV show that follows couples who have applied for or received a K-1 visa and are planning to get married within 90 days. The show provides an inside look into the challenges these couples face as they navigate cultural differences, family dynamics, and the pressure of time constraints. With a mix of drama, romance, and real-life struggles, 90 Day Fiancé has gained a large following and has spawned multiple spin-offs.