Various arrow nocks

[Standing Bear]

I really haven't been paying attention to what types of nocks I was shooting, the only thing that really mattered was, "Do they stay on my string, if so, great".

Can someone explain to me what differences exists in nocks example, the 'X' nock versus the 'H' nock. I always thought a nock was a nock period. Perhaps I have been missing out on something that can help me in the future.

I'm really interested in reading about what you all have to say. Now if we look at the Turbo Nock, I know what that does, adds rotation to the arrow enabling the broadhead to twist while entering its target but the other ones, I really don't know.

Thanking you in advance for your help.