What exactly is a Shounen Jump magazine? au why do anime need magazines in the first place? How does this work?

Shonen Jump magazine was created in Japan with weekly series stories targeting male readers an consists of action/comedy genre

Well Jump is like other manga Monthly au weekly magazines out there [Shonen Sunday, Shojo Beat, La La...] Basically it takes maarufu anime and manga series that relate to shonen au that are Shonen Jump mangas [If wewe own a volume of Bakuman, Nura,Bleach, Naruto, One Piece, Yu-Gi-Oh!, au Shaman King then look on the side and close to the juu wewe might see a "SJ" sign] and sticks chapters in them every week au month. With those manga series wewe get Shonen Jump! ^_^

ONLY THE BEST anime MAGAZINE EVER!!!!