Geofencing Advertising: How Local Businesses Reach People Who Just Left a Competitor's Parking Lot

I’m going to describe a campaign, and you tell me if it sounds like science fiction.

A remodeling company draws an invisible line around the home improvement stores in its service area. Anyone whose phone crosses that line gets added to an audience. For the next 30 days, those people see the remodeler’s ads — on their phones, in their apps, on the websites they browse. Not everyone in the zip code. Not “homeowners 35–65.” The specific people who walked into a store to price out cabinets last Tuesday.

That’s not science fiction. That’s geofencing, it’s been quietly working for local businesses for years, and most SMB owners we talk to still don’t know it exists.

What geofencing advertising actually is

Geofencing draws a virtual perimeter around a real-world location — a store, a competitor, an event venue, a neighborhood. When a mobile device enters that perimeter, it can be added to an advertising audience. From there, you can serve display and mobile ads to those devices wherever they go next.

The part that surprises people: the targeting doesn’t expire when they leave. You can reach consumers who visited a target location in the past, regardless of where they are now. Someone who attended a home show in March can still be seeing your ads in April.

The three plays we run most often

1. Competitor conquesting. Fence your competitors’ locations. Anyone who visits them is, by definition, in-market for what you sell. This is the single most requested campaign we run, and for good reason — there is no colder audience filter than “physically drove to a place that sells this.”

2. Event targeting. Home shows, trade expos, festivals, games. Fence the venue for the day, then market to attendees for weeks afterward. You just built an audience that would have cost thousands in booth fees.

3. Your own customers. Fence your own location and build a re-marketing audience of actual visitors — people you know converted at least once. Pair it with household extension and you’re also reaching the other devices in their homes.

“Okay, but does it work?” — how you measure it

This is where geofencing separates itself from most local advertising: it can close the loop.

Beyond standard impression and click reporting, geofencing campaigns can track store visits — how many devices that saw your ad later walked into your location. That’s foot-traffic attribution, and it’s the metric that matters for a car wash, a showroom, a gym, or a restaurant. Not “reach.” Not “brand lift.” Bodies through the door.

One honest caveat, because we’d rather lose a sale than overpromise: attribution windows and match rates vary, and no location data is perfect. What you get is a directional, consistent measure you can compare month over month — which is more than radio, print, or a billboard will ever give you.

Who this is for (and who it isn’t)

Geofencing earns its budget when physical location matters to the sale: home services, healthcare, auto, fitness, restaurants, retail, events. It’s also a fit for multi-location businesses that want to defend their turf store by store.

It’s the wrong first dollar if your business is purely e-commerce, or if your service area is so broad that “location” isn’t a meaningful signal. We’ll tell you that in the first call.

What a real campaign looks like

A typical engagement with us includes fence selection and audience strategy (which locations, what radius, what dwell-time rules), creative sized for mobile and display, campaign management, and monthly reporting on impressions, clicks, and store visits. Most local campaigns can launch within days, not months.

FAQ

Is geofencing advertising legal?
Yes. It uses anonymized device and location data that consumers opt into through their apps. Ads are served to devices, not identified individuals, and campaigns follow platform and privacy regulations.

How precise is a geofence?
Precise enough to fence a single building or parking lot. We typically recommend fencing the location itself rather than a wide radius — tighter fences mean higher-intent audiences.

How long can I target someone after they visit a location?
Lookback and retargeting windows are configurable; 30 days is a common starting point. Longer windows grow the audience but dilute intent.

How much does geofencing cost?
It’s priced like other programmatic media — primarily on impressions served. It fits comfortably inside most local advertising budgets, and we’ll scope it to your service area on a call.

Want to see what a fence around your competitors would look like? Talk to Eighty6 — or start with a free marketing assessment.