Open the shared Google Maps list link (not the main map). On the list page with all the business names visible, press Ctrl+A → Ctrl+C → click the box below → Ctrl+V to paste.
Type each stop and press Enter — autocomplete helps find the right place.
Describe what went wrong or what you expected to happen. The more detail, the better!
How many areas do you want to target? You'll draw a box for each area, select businesses, and run all routes in sequence.