I’ve not visited this site, but apparently it’s an oval shaped Iron Age defence, of about 0.9 hectares. It has an inner bank and ditch as well as an outer bank and ditch which is incomplete (and may have never been finished).
For some reason the fort doesn’t stand at the summit of the hill, but on the ground sloping away from it looking out towards Cheriton. This makes no sense in defensive terms, so it’s a bit of a mystery.