Why did the invasion of Britain by the Romans take place?

One of the main reasons that the Romans invaded Britain is because their relatively new emperor, Claudius was in danger of being seen as weak, and it was thought that if the Romans get a swift and clean victory under Claudius it would make him more secure in his place as emperor of the Romans.

To accomplish this victory they decided that Britain was the easiest target and that they could achieve a quick and easy victory. This is why in 43 AD four Roman legions invaded Britain.