In shared accommodation you usually have your own bedroom and share the rest of the property with other tenants and/or the landlord/lady. Shared accommodation is generally the cheapest and easiest to find. An advantage to shared accommodation is that the bills are usually included in the rent and the deposit and rent in advance are also cheaper.
You may consider this as an option in order to save up money towards a deposit and rent in advance to enable you to secure self-contained accommodation at a future time. Shared accommodation may also be advertised as rooms, house/flat shares or bedsits.