The best type of training split is determined by how many days per week you're training. It all comes down to getting in enough training volume of each muscle group throughout the week.
If you're training two to three times per week, total-body workouts are best (with a day or two off between each workout, of course).
If you're training four times per week, an upper-body, lower-body split like this is best:
If you're training five to six times per week, a body-part split is best in order to allow sufficient recovery of each muscle group between workouts. You can use either a three-day-on and one-day-off rotation, or use a four-day-on, one-day-off rotation.
A typical three-day-on, one-day-off rotation split is:
For a four-day-on, one-day-off split, here a two of my favorites:
Regardless of which setup you use, can always throw in a few extra sets for another muscle group that you're not necessarily focusing on that particular day if you need to increase the number of sets it gets to spark more growth.