There are two addresses you will use day to day:
Registered office address – this is the address at which your company is registered at Companies House. It is where official correspondence from Companies House and HMRC will be sent. This address is also visible on the public record and can be viewed on Companies House website.
Trading address – this where your business is conducted from. It maybe your home address especially if you mainly work on your clients sites. The trading address is where your clients, bank, agents, suppliers etc send you correspondence.
The registered office address does not need to be the same as your trading address.