How to leverage SMS text message marketing to increase return visits

Welcome to the Purple technical briefing series. Today we are talking about SMS text message marketing - specifically, how venue operators can use it to bring guests back through the door. Not just once, but repeatedly. I am going to cover the data capture architecture, the compliance framework, the campaign mechanics, and the ROI picture. By the end of this, you will have a clear view of what good looks like and what to avoid. Let us start with the problem. Most venues - hotels, retail chains, stadiums, conference centres - have a significant gap between first-time visitors and repeat visitors. You might get someone through the door once, but without a direct communication channel, you have no way to pull them back. Email has been the default answer for years, but open rates for marketing email sit at around twenty to thirty percent. SMS is a different proposition entirely. Industry data consistently puts SMS open rates at ninety-eight percent, with eighty-two percent of messages read within five minutes of delivery. That is not a marginal improvement. That is a different channel category. The question, then, is where the phone numbers come from. This is where Guest WiFi becomes the data capture layer. When a guest connects to your venue WiFi through a captive portal - that is the login page they see before they get internet access - you can ask them to enter a phone number as part of the authentication flow. Purple Engage does this at the point of login. The guest enters their number, receives an SMS with a confirmation code, enters that code, and they are online. At that point, you have a verified, opted-in phone number tied to a real visit event. Not a purchased list. Not a scraped database. A first-party data point with a consent record attached. That distinction matters enormously from a compliance standpoint. Under GDPR, which applies across the UK and EU, and under the CCPA in California, you need explicit, freely given, specific, and informed consent before sending marketing SMS. The double opt-in flow I just described - enter number, confirm via SMS - satisfies that requirement. Purple is ISO 27001 certified and GDPR and CCPA compliant, so the consent record, the timestamp, and the opt-in mechanism are all logged and auditable. If you are running venues in multiple jurisdictions, that matters. A single consent architecture that works across the UK, EU, and US saves your legal team a significant amount of work. Now let us talk about the campaign architecture itself. There are four campaign types that consistently drive return visits, and they map to different points in the guest lifecycle. The first is the post-visit thank you. You send this within twenty-four hours of the visit, triggered automatically when the guest's WiFi session ends. The message is short - under one hundred and sixty characters - and includes a personalised offer for their next visit. Something like: "Thanks for visiting us today. Here is fifteen percent off your next stay - valid for thirty days." Industry benchmarks put click-through rates on post-visit SMS at around thirty-four percent. That is ten times the equivalent email benchmark. The second campaign type is re-engagement. You target guests who have not visited in thirty or more days. The trigger is absence - no WiFi login detected in the defined window. The message creates urgency: a time-limited offer, an event announcement, or a loyalty milestone reminder. This campaign type typically drives a twenty-one percent uplift in return visits among the targeted segment. The third type is event and promotion alerts. If you are running a stadium, a conference centre, or a hotel with a restaurant, you have events. SMS is the fastest way to fill seats. A message sent on a Tuesday morning about a Thursday evening event, to guests who have previously attended similar events, will outperform any social media post or email newsletter. The ninety-eight percent open rate is the reason. The fourth type is loyalty milestone messaging. When a guest reaches their fifth visit, their tenth visit, or a spend threshold, you trigger an automated congratulations with a reward. This closes the loop on loyalty without requiring a separate app download or loyalty card. The WiFi login is the loyalty check-in. Purple Engage tracks visit frequency and triggers the milestone message automatically. Let me give you two concrete examples of how this plays out in practice. The first is a mid-scale hotel chain. They deployed Guest WiFi across forty properties, using Purple Engage to capture phone numbers at login. Within ninety days, they had built an opted-in SMS list of sixty thousand verified guests. They ran a post-visit campaign with a thirty-day return offer. Return visit rate among SMS recipients was thirty-one percent higher than the control group who received no message. Average revenue per returning guest was also higher, because the offer drove direct bookings rather than OTA bookings, eliminating the commission cost. The second example is a retail chain - a fashion retailer with thirty stores. They used WiFi login data to identify shoppers who had visited once but not returned within sixty days. They sent a re-engagement SMS with a personalised offer based on the department they had browsed during their first visit - that data came from dwell time analytics on the WiFi network. The re-engagement campaign achieved a twenty-six percent conversion rate. For context, their email re-engagement campaigns were running at around eight percent. Now, the implementation pitfalls. There are three I see consistently. The first is frequency. Send too many messages and opt-out rates climb fast. The data shows that around fifty-three per cent of SMS opt-outs are triggered by over-frequency. For most venue types, two to four messages per month is the ceiling. Build your campaign calendar around that constraint from the start. The second pitfall is irrelevance. A guest who visited your hotel restaurant should not receive a message about your spa package if they have never engaged with spa content. Segmentation is not optional. It is the difference between a thirty-four per cent click rate and a three per cent click rate. Purple Engage segments automatically based on visit behaviour, dwell location, and engagement history. The third pitfall is timing. SMS is immediate. A message sent at eleven PM is a message that wakes someone up. Most platforms allow you to set send-time windows. Stick to nine AM to eight PM in the recipient's local time zone. This is not just good practice - in some jurisdictions it is a legal requirement. Let me give you a rapid-fire set of questions I hear from IT and marketing teams. "Do we need a separate SMS platform?" No. If you are running Purple Engage, the SMS campaign functionality is built in. You do not need a third-party SMS tool. "How do we handle guests who opt out?" Purple Engage processes STOP replies automatically and removes the number from all future campaigns within minutes. The opt-out record is logged. "What hardware does this work on?" Purple is hardware-agnostic. The captive portal and data capture layer runs as a cloud overlay on Cisco Meraki, HPE Aruba, Ruckus, Juniper Mist, Ubiquiti UniFi, Cambium, Extreme, and Fortinet. You do not need to replace your existing infrastructure. "What is the ROI?" Conservative industry estimates put SMS marketing ROI at between twenty-one and forty-one pounds returned for every pound spent. Some seasonal campaigns report returns up to seventy-one to one. The cost per message is typically two to four pence. At those economics, even a modest return visit rate improvement pays back the programme cost within weeks. To summarise. SMS text message marketing is the highest-engagement direct channel available to venue operators today. The data capture mechanism is your Guest WiFi captive portal. The compliance framework is double opt-in, with consent records stored and auditable. The campaign architecture maps to four lifecycle stages: post-visit, re-engagement, event promotion, and loyalty milestones. The three pitfalls are frequency, irrelevance, and timing - all of which are solvable with proper segmentation and send-time controls. If you are running Purple Engage, you already have the infrastructure. The phone number capture flow, the campaign automation, the segmentation engine, and the compliance logging are all part of the platform. The next step is to define your campaign calendar, set your audience segments, and run a thirty-day pilot against a control group. Purple operates across eighty thousand live venues globally, with three hundred and fifty million unique users and four hundred and forty million logins recorded in 2024. The data picture we can build from Guest WiFi is one of the richest first-party data assets in the venue technology space. SMS is one of the most direct ways to activate it. Thank you for listening. If you want to go deeper on any of the topics covered today, the full technical guide is available at purple dot ai. We will see you in the next briefing.