A standard clean maintains a home. A deep clean resets it. That's the whole difference, and almost every disappointing cleaning experience comes from booking the first when the house needed the second.
A standard clean works on the surfaces you touch daily: counters, sinks, stovetop, toilets, tubs, mirrors, reachable furniture, floors, and bins. It assumes the corners are already in decent shape, so it doesn't spend time on them. On a home that's already been reset, that's exactly right, and it's why recurring visits stay affordable.
A deep clean works from the ceiling line down and treats the corners as the point of the job: fan blades, light fixtures, door frames, the tops of doors and cabinets, switch plates, baseboards, window tracks and sills, grout, cabinet fronts, and behind and under furniture that can be safely moved. Kitchens get degreased rather than wiped; bathrooms get descaled rather than shined.
Here's the simple test. Run a finger along the top edge of a door frame and along the track of the window nearest your kitchen. If both come back clean, a standard visit will keep you where you are. If either one doesn't, no amount of surface cleaning will fix the way the room feels, because the dirt isn't on the surfaces.
Our usual recommendation for a new client is one deep clean followed by a recurring standard schedule. The first visit does the hard work once; every visit after it is maintenance instead of catch-up, and the price drops accordingly.