His question is asking: What are the BEST pull ups to build muscle in your lats & get that "V-Taper Back" look
That V taper look will make you look
powerful, strong and command respect.
To answer this:
All pull up variations hit your lats (overhand, underhand, wide grip, etc)
But wide grip pull ups specifically
target your lats the most.
If your goal is to build muscle you want to increase the time under tension while doing the pull ups, like this:
Do a 2 second count up, pause 2 seconds and lower slowly for 2 seconds and repeat 5-8 reps times for 3-4
sets.
If you do pull ups like that (slow and controlled) I guarantee your lats will have an insane pump!
Getting your lats bigger will give you that V taper back look that makes you look powerful and strong.
So to sum this: Any pull up as long as you perform them slowly and controlled will build up your lats and get you that strong and powerful V-taper look.