As long as you are using a secure computer there are many benefits.
1) manage ur account without leaving your home
2) balance transfers
3) set up direct debits/Standing orders or just generally pay bills
4) order new cards
5)set up savings accounts
6) increase/decrease overdraft
Basically most things you would need to go to a bank for, but would much rather stay at home. Especially if its bad weather!!! :-)