Why did the Vikings travel to Britain?

The Vikings travelled thousands of miles across the sea from their homeland of Scandinavia where they were farmers, fishermen, seafarers and traders.

Better land

Most Vikings were simply searching for better land for their farms. Their land was not very good for growing crops or rearing animals:

Norway was very hilly,

Sweden was covered in forests, and

Denmark had a lot of sandy soil.

More Land

Some historians believe the Vikings left their homes because of over crowding. There was not enough good land for everyone to share. 

In a Viking family only the eldest son inherited the family farm so younger brothers had to make their living elsewhere. 

Treasures

The Vikings searched for treasures to make them rich. Britain was particularly a good place to raid, as there was much to steal.  The Vikings were attracted by the wealth of the Monasteries and the easy treasure to be found within