I only use it in references to juvenile expressions of disinterest. For instance, you're trying to explain something important to an uninterested teenager. They might dismiss you by saying: "Anyways" They might say "Anyway" but "Anyways" just sounds so much more disdainful.

"Anyways" is not standard English, but we sometimes say it anyway(s) for amusement. :) Much like how we sometimes say "anyhoo" for anyhow.

Anyway is correct, but many Americans say anyways. Any takes a singular noun, so anyway has to be the only correct way.

Anyways used in American English informally=anyway