They want to know that their eight year old will be safe, that the coaches are DBS checked and insured, and that this is not going to be a room full of grown men hitting each other while their child watches.
They want the class times to be findable, the first-month cost to be obvious, and to know whether they need to buy anything before turning up. And more than anything they want a photograph of a junior class in progress, so they can see the kind of place it is. Almost no club website has one.