Confused about winnings from poker

[HarrySH]

I have a quick question about poker - what are the winnings classed as financially? I have looked at sites but can't see anything about gambling winnings. I've been playing it more recently and starting to get the hang of making money out of it. I was wondering if anyone could help me out? Thanks in advance

Edited May 4, 2018 by Sir Puntalot
Link removed.

[muttley]

It's tax free, if that's what you mean.