Location-based online advertising is a form of digital marketing that uses a user's physical location to serve them ads. This type of advertising uses location data such as a person's current city, zip code, latitude, and longitude to target ads to a specific audience. Location-based online advertising can be used to target users in a particular area, such as a city or neighborhood, or can be used to target people based on their interests or demographic profile. For example, this type of advertising can promote local businesses, events, and services or target potential customers based on their interests.