Adventurers League, DM Quest: “Giving DM”

The question is about a DM Quest from Adventurer League.

There is an achievement ‘Giving DM: Run a game as part of a charity event‘.

Can anybody explain what it means and how to get it? Does it mean that I must run an adventure without getting money or any other goods from my players? Or does it mean that there are special charity events across the world where DMs are running sessions?

I don’t understand what "charity events" means. Can somebody explain me what a "charity event" is? How I could join a charity event?

I’m not sure, but maybe I should mention that in the country where I live D&D is almost unknown, so we don’t have any particular "charity events" where I could run a game.