Can a Vaishali business get customers from Delhi through its website?
Through organic search and ads, yes. Through Google Maps, largely no, and it is worth being clear about the difference. Google weights physical proximity very heavily in the local map results, so a business with a Ghaziabad address will rarely appear in a map pack shown to someone searching from central or south Delhi. What does work is ordinary organic ranking, where distance is not a direct factor, plus paid search targeted at Delhi postcodes. So the honest plan for a Vaishali business chasing Delhi customers is to win the Ghaziabad map results, rank organically for service terms that are not tied to a location, and use ads if Delhi is a priority. Anyone promising you the Delhi map pack from a Ghaziabad address is overselling.