How to leverage SMS marketing statistics to increase return visits

How to leverage SMS marketing statistics to increase return visits - a Purple guide [INTRODUCTION AND CONTEXT - approximately 1 minute] Welcome. If you run a hotel, a retail chain, a stadium, or any venue where people connect to WiFi, this episode is for you. We are going to talk about SMS marketing statistics - not the headline numbers you have seen on every marketing blog, but what those numbers actually mean for your venue operations, your data architecture, and your return visit rate. SMS marketing carries a 98% open rate. Email sits at around 21%. That gap is not a marketing talking point - it is an operational reality that changes how you should think about your post-visit engagement stack. When 90% of recipients read a text within three minutes of receiving it, and the average email takes four hours to be opened, the channel you choose for re-engagement has a direct bearing on whether a guest comes back this week or not at all. The challenge most venue operators face is not the channel itself. It is the data. You cannot send a compliant, personalised SMS to a guest if you do not have a verified mobile number. And that is exactly where Guest WiFi becomes the most underused asset in your building. [TECHNICAL DEEP-DIVE - approximately 5 minutes] Let us get into the architecture. When a guest connects to your WiFi through a captive portal, you have a moment of conscious-choice opt-in. They are actively choosing to share their contact details in exchange for access. That is first-party data - verified, consented, and directly tied to a physical visit at a specific venue, on a specific date, at a specific time. Purple Engage captures that data at login across more than 80,000 live venues. The phone number collected at the captive portal is not just a marketing asset. It is a verified identifier that links a physical presence to a digital profile. That distinction matters enormously when you are thinking about GDPR compliance. Under GDPR, you need a lawful basis for processing personal data. Consent obtained at a captive portal - where the guest explicitly ticks a box agreeing to receive marketing messages - satisfies that requirement. The consent is timestamped, venue-stamped, and auditable. Now, what do you do with that number? The answer depends on what the SMS marketing statistics tell you about timing, segmentation, and message type. On timing: data from DMText, analysing 38 million messages sent in 2025, shows that the 5pm to 8pm window delivers a 28.6% click-through rate - the highest of any time slot. For a hotel, that means a post-checkout message sent on the afternoon of departure, or a re-engagement message sent the following Friday evening, lands at the moment a guest is most likely to be thinking about their next stay. For a retailer, a Thursday or Friday afternoon message about a weekend promotion hits when purchase intent is highest. On segmentation: this is where the gap between average venues and high-performing venues opens up. A flat broadcast to your entire SMS list will generate results. A segmented campaign - split by visit frequency, spend level, venue location, or last visit date - will generate significantly better results. McKinsey research shows that companies excelling at personalisation generate 40% more revenue than average. In SMS terms, using multiple personalisation fields - first name, venue name, last visit date - lifts conversion rates by 119% compared to no personalisation, according to DMText platform data. The technical implementation here sits at the intersection of your WiFi analytics platform and your CRM. Purple's WiFi Analytics platform captures dwell time, visit frequency, and venue-level behaviour. When that data feeds into Purple Engage's segmentation engine, you can build audiences like: guests who visited more than twice in the last 90 days but have not returned in 30 days. That is a lapsed-loyal segment. An SMS to that group, offering a specific incentive to return, will outperform a generic broadcast every time. On message architecture: keep messages between 80 and 120 characters. DMText data shows that length achieves the highest click-through rate at 26.8%, while staying within a single SMS segment - which matters for cost at scale. Include a single clear call to action. Link to a mobile-optimised landing page. And critically, include a clear opt-out mechanism in every message. Under GDPR and the UK's Privacy and Electronic Communications Regulations - PECR - that opt-out must be simple and free. The ROI numbers are striking. Across e-commerce campaigns, DMText reports an average 42:1 return. Restaurants see 51:1. For hospitality venues running post-stay re-engagement campaigns, the range sits between 400% and 1,500% ROI according to industry benchmarks. The reason the numbers are this high is the marginal cost of an SMS - typically a few pence per message - against the revenue value of a return visit, which for a hotel might be £150 or more per night. [IMPLEMENTATION RECOMMENDATIONS AND PITFALLS - approximately 2 minutes] Here is how to build this in practice. Start with your WiFi infrastructure. If you are running Cisco Meraki, HPE Aruba, Ruckus, Juniper Mist, or Ubiquiti UniFi hardware, Purple deploys as a cloud overlay - no hardware replacement required. The captive portal sits on top of your existing network. You configure the login flow to include an SMS opt-in field, with clear consent language that satisfies GDPR Article 7 requirements. Once data is flowing, set up three foundational automated campaigns in Purple Engage. First: a welcome message sent within 24 hours of a first visit. Keep it short - introduce the venue, offer a reason to return. Second: a re-engagement trigger for guests who have not visited in 28 days. This is your highest-value automation. Third: a loyalty milestone message when a guest reaches their third visit. Recognising loyalty drives the fourth visit. Now the pitfalls. The most common failure mode is frequency. Validity Research data shows that 49% of consumers cite messaging too frequently as the top reason they unsubscribe. Set a minimum gap of seven days between messages to the same number. The second pitfall is relevance. Sending a hotel spa promotion to a guest who only ever visited your conference facilities is wasted spend and a fast route to an opt-out. Segment before you send. The third pitfall is timing. Messages sent between 10pm and 6am generate the highest opt-out rates. Most SMS platforms allow you to set quiet hours - use them. On the compliance side: document your consent collection process. Purple's platform timestamps and logs every opt-in, which gives you an auditable record for GDPR Subject Access Requests and ICO investigations. Do not rely on inferred consent or soft opt-ins for SMS. The channel requires explicit consent under PECR, and the ICO has issued fines for organisations that got this wrong. [RAPID-FIRE Q AND A - approximately 1 minute] Question: how many SMS messages should we send per month to a single contact? Answer: two to four is the industry sweet spot. Beyond four, opt-out rates climb sharply. Question: should we use a short code or a long code number? Answer: for high-volume venue campaigns in the UK, a dedicated short code gives you better deliverability and brand recognition. For smaller operations, a long code works fine. Question: what open rate should we expect in year one? Answer: 90% to 98% delivery and open rate is standard. If you are seeing below 85%, check your list hygiene - invalid numbers drag the average down. Question: can we integrate SMS with our existing CRM? Answer: yes. Purple Engage integrates with major CRM platforms via API. The phone number captured at WiFi login becomes a shared identifier across your marketing stack. [SUMMARY AND NEXT STEPS - approximately 1 minute] Here is the short version. SMS marketing statistics show a channel that outperforms email on every engagement metric that matters for return visits: open rate, response time, click-through rate, and ROI. The constraint is not the channel - it is the data. Verified, consented first-party mobile numbers, captured at Guest WiFi login, are the foundation of a compliant and effective SMS re-engagement programme. The implementation path is straightforward: deploy Purple Engage on your existing WiFi hardware, configure a GDPR-compliant opt-in flow at the captive portal, build three automated campaigns - welcome, re-engagement, and loyalty milestone - and segment your audience before every send. If you want to see how this works in practice, visit purple.ai and look at the Engage plan. Or read the full technical guide linked in the show notes. The data is clear. The infrastructure exists. The next return visit is waiting to be triggered. Thanks for listening.