With full body workouts you can expect to hit all the major muscle groups 2-4 times a week rather than just once a week if you follow a split based programme.
Full body workouts generate a lot of muscle stimulus and expand a lot of energy making them a good choice for fat loss and building lean muscle.
The bonus to performing full body workouts is that a much lower time is required to perform them and they give you more flexibility to structure your workouts with rest days in-between. Most people don’t have time to go the gym every evening to train a different body part each day.