In a shared hosting, a full server  is distributed among all the subscribers,so basically, you as a shared hosting subscriber  ,is sharing

a physical server with others.the more the number is more it will impact your bandwith.for Virtual private servers or VPS,this chance

becomes significantly low.actually, with a VPS plan, you will not get a full physical server slot but some fixed part of it .so your websites doesn’t face any  bandwith issue & operates  smoothly irrespective of your webiste traffic.