Coastal management on the cliffs at Cromer

Here is a new type of coastal management being tried out on the cliffs in Cromer. Goats have been put into a fenced off area of the cliff to graze on the vegetation that is growing there... I went to Cromer today to take a photo of them, and other parts of the town.
Why were they introduced?

Here's a local news story on the project:


goats_for_web from ITV Anglia on Vimeo.