A kitchen or bath remodel brings a lot of trades into one small room. Done in the right order, each step sets up the next. Done out of order, work gets torn out and redone.
It starts with demolition and rough-in. Once the old room is out, plumbing and electrical are moved to where the new layout needs them while the walls and floor are open. This is the stage to add outlets, lighting circuits, and shut-off valves.
Next comes drywall, then primer and the first coat of paint. Painting before cabinets go in is faster and cleaner, and it means you are only touching up at the end instead of cutting in around every cabinet.
Flooring usually goes in before cabinets in a kitchen, so the floor runs continuously and appliances can be pulled out later without a step. Then cabinets, counters, backsplash, fixtures, and trim, followed by final paint touch-ups and a walkthrough to catch the small details.