The idea is, if a cafe advertises great coffee everyone will enjoy, they will generate tepid interest by being too general. However, a cafe that markets the hottest espresso this side of The Tiber may alienate people who don't care for espresso, but will invigorate Italophiles and create a loyal, active customer base.
How do you see this play out in your writing? Is it something you're conscious of in a first draft, or does it come out in the revision process? Or is this even a priority for your work?
I'm grateful for any advice you can provide.