how would you explain rich snippet to a client?

i'd say: it's the extra stuff a search result can show, like star ratings, a price, FAQ dropdowns, cooking time. you get it by adding structured data to the page (schema markup), which labels the content so google can read it. honest version for the client: it doesn't rank you higher, but a result with stars and a price gets clicked more than the plain one next to it. worth doing at any size if you have products, reviews, events, recipes, or job listings. for a plain services page there's not much to mark up.