Across the top of that page, research all of the links. "Things to do" "Weddings/Celebrations" "Corporate Hospitality" etc.
What do the sell?
It's a historic site. Tourism! Services would be all of the activities one could take part in, or they also appear to give people the option to plan their weddings there.
So that sort of information is what you'd probably want to research and use to answer that question.
Promotions?
That entire site is promotion. I would say you should research the site. Each promotion they have is to show tourists what fun and exciting things they have to offer.
Meeting customer needs?
All of the sites and attractions they have to offer, of course. Researching the different things they have to offer for the enjoyment of all of their customers would likely be the suitable answer for this.
Also, you can do more research for this one by searching Google for "Hever Castle customer reviews"
That will give you the customer's perspective and experience with the place.
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