challenges?

can anyone help me and explain what they are and how to do it coz i have totaly no idea what to do , is realy annoying as new player in poe 1 to try to do something complitely have no idea what to do ? as in my opinion the explanation of how to reach the achievments is so crap from devs side , leaving new people without any help

Go into game, click menu and see Challanges. There youll have a list of them with descriptions.

Overall just play the game and when mapping check what you want to finish.