Brunch is the search that matters. It carries far more volume than coffee, it produces a bill several times larger, and it is planned an hour or two ahead rather than decided on the pavement.
The filters do the choosing. Dog friendly, good for laptops, step-free, high chairs: those phrases sort a town's cafés into a shortlist of two, and most venues never write any of them down.
A large share of the traffic is somebody standing outside asking what is open now. Hours that are wrong on a bank holiday cost more custom than any amount of marketing brings in.
Dietary options decide group visits. One vegan or coeliac in a group of four chooses the venue for all of them, which makes a clear menu note worth more than it looks.