What is the difference between footfall, visits and unique visitors?
How the three counts differ
Footfall counts people entering a shop or business, and a portion of that footfall leaves without buying anything, which is how Norwich Business Improvement District in the United Kingdom monitors it 1. Unique visitors count the distinct people in the store, which allows both unique and returning visitors to be measured, in a way comparable to unique traffic in digital advertising 2. The gap between the two is repeat visiting: one person who enters a store three times adds three to the footfall or visit count and one to the unique visitor count 2.
How each is measured
- Footfall and pedestrian flow can be captured by cameras or sensors, or bought as external data, as in Poitiers, France, which purchases MyTraffic data to monitor monthly pedestrian flows and map footfall per street 1.
- Unique visitors can be derived from the detection of unique mobile devices, which also supports insights on repeat visits and depth of engagement alongside dwell time 2.
Why the distinction matters
Footfall measures are less reliable across locations, because different data providers use varied methodologies, which makes comparability and joint analysis between cities difficult 1. Footfall is best read as the audience for a store, with the conversion of that footfall treated as the equivalent of box-office bookings 3. Visit patterns also shift over time: the PwC Real Estate Retail Market Report 2025 records a steady decrease in the visitor gap against 2019, with levels around 5% lower, alongside rising weekday and morning traffic 4.