One of the most versatile tools a physical business has for collecting customer data is its point of sale (POS) system. A POS works as a cash register and tracks what customers buy, how much they spend, and how often they visit. It also manages inventory, monitors employee sales, and simplifies accounting.
POS systems such as Lightspeed, Toast, and Clover are a reliable way to collect customer contacts, which makes them valuable for marketing. With a POS, a brick-and-mortar business can know almost as much about its customers as an ecommerce giant does.
Powerful, but not perfect
POS systems have two blind spots. First, they do not see everyone who visits. When one guest pays for a party of five, the other four stay invisible. Guests who pay cash, or use a different card than last time, are invisible too.
Second, a POS cannot tell you whether a visit came from your digital ads unless you require a promo code or redemption. Without that link, you cannot judge what your campaigns are worth. You may know that sales are up or down, but not whether your ads had anything to do with it.
Use WiFi to support your POS
Combining POS and guest WiFi connects you with more customers and tells you more about them. The guest WiFi login page gives you a way to reach customers who never interact with the POS. Here is what the combination adds.
- More contacts. Guest WiFi captures contacts the POS misses. In the party of five above, a business without guest WiFi has no way to reach the four guests who did not pay, short of outdated tools like comment cards. Capture one more contact from that table and you have doubled what the POS collected on its own.
- A better read on customer lifetime value. Visit frequency, visit times, favorite items, and average spend let you write more targeted messages. These insights show which customer groups are worth the most, so you can learn what they want and improve their experience.
- Sharper targeting and messaging. Knowing more about your customers means you can put the most relevant message in front of each one. A guest who has not been in for a while might get an email about new menu items. A high-end clothing brand could invite its biggest spenders to a VIP event. Combined POS and WiFi data builds detailed profiles that put the right message in front of the right person.
- A clearer view of the customer journey. Guest WiFi shows a physical business when customers actually visit. Paired with your POS, it connects the emails and ads sent to opted-in customers with an in-store visit or purchase.
Know your customers, grow your business
Knowing more about your customers lets you serve them better, communicate more effectively, invest your marketing budget more wisely, and improve the customer experience. Technology makes it easier than ever to learn what your customers need and stay in touch with them.
Ecommerce businesses succeed in part because they combine several technologies to cover every customer touchpoint while collecting useful data. Use everything your POS and guest WiFi provide, and a physical business can get the same kind of results.
Originally published on the Zenreach blog on August 27, 2019. Zenreach is now Adentro. This article was lightly edited in October 2026.