sorry im new to the bow scene but is it absolutely necessary to take down your bow after use or does it not really matter ?

For recurves and long bows yes. Any self strung bow it will help the life span of the limbs from a chance of them twisting on you. A compound never worry about it. I don't mess with my compound string until it's time for a new one.

You can leave both longbows and recurves strung safely but only if you hang it by the string.I put a couple short dowels in a wall and center the bow string on them allowing the bows to hang freely.Any other way will cause limb twist.Never store any bow standing on end strung or not.

You should always unstring a selfbow, but not laminated bows. Black Widow strongly reccomends leaving their bows strung, as most accidents resulting in damaged and/or twisted limbs is during the string or unstringing process. My personal bows stay strung for months at a time. My main bow, that I've been shooting for 15 years or so, hasn't lost a pound of draw weight--at least not according to the scale.

You can hang the bow by the string, or I let mine rest on two pegs at each end of the fadeouts (basically at each end of the riser, or handle), or you can lay them flat like under a bed. Never leave one standing on end for any length of time, and never leave one where the temps get very high (like in a vehicle in the summer).