Anti Social Behaviour encompasses a lot of behaviour which would cause reasonable persons upset.
Commonly it associated with bad behaviour like persistant drunkeness in public, abusive behaviour, disorderly conduct but it can also be associated with persons constantly playing loud music from a flat and such things.
It is a civil process although they can be attached after a criminal conviction but there is need for the Police to work together with the local authority to take out an order, neither the Police or the Local authority can apply for one on their own.
Anti Social Behaviour is a four step process starting with etc...