generally, if a work doesn't have any mounting, if it wants to be preserved, it's good to put it in a ventilated place to ensure that it won't be damp and moth-eaten.
if it wants to be hung, it's better to go to a mounting shop. After all, specially trained mounters are much better than our DIY. If they don't mount it well, they may damage the work. Mounting can be mounted into pieces (the cheapest), shafts (the second) and frames (the most expensive). It depends on the shape of the work and the place where it hangs. Generally, tell the framer about the situation and he will give you advice.