Let's say for the sake of conversation a guy wanted to wrap a handle like that, what that wrap called, how'd you learn that?
It's called a whip wrap. Very easy to learn. The most important thing is to keep the line as tight as possible through the whole process. I like waxed bank line, as it doesn't add too much girth to the handle and its very grippy. https://www.netknots.com/rope_knots/common-whipping