The guidance sets out details of vaping use among young people in Wales and actions schools can take to address vaping.
Mae'r canllawiau'n nodi manylion ynghylch defnydd e-sigaréts ymhlith pobl ifanc yng Nghymru a chamau y gall ysgolion eu cymryd i fynd i'r afael â defnyddio e-sigaréts.