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How to write a marketing SMS that converts (even in 160 characters)

How to write a marketing SMS that converts (even in 160 characters)

SMS Marketing
May 16, 2025

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Comment écrire un SMS marketing qui convertit (même en 160 caractères)

You’ve surely experienced this before: a message pops up on your phone. You take a quick look… and, just like that, it’s forgotten. And yet, when done right, SMS marketing can really make a difference. Why do some messages stick in our minds, while others vanish instantly?
With its 160-character limit, SMS forces you to get straight to the point.

And within that ultra-limited space, you have to manage to grab attention, spark interest, and drive a click or a purchase. Not so simple, but certainly not impossible.

Let’s look at how to create a punchy marketing message without falling into clichés or losing your natural tone. There’s no magic formula, just simple rules, concrete examples, and tips you can use for your next campaign. You’ll see that even with just a few words, you can say a lot.

Knowing your target audience is the foundation (really)

Even before you write your SMS, one question is essential: who exactly are you talking to? Because everything that follows depends entirely on that.

A loyal customer? A prospect? A recent buyer? The answer changes everything.

A message that works is a personalized message. And to personalize, you need to know your customers: their needs, their habits, their pain points. You don’t need to know everything, but having a little bit of information changes the game.

Use your database (CRM, email tools, purchase history) to segment intelligently. Sending the same SMS to everyone? No thanks. By targeting better, you improve your open rates, engagement, and chances of conversion. And the more relevant your messages are, the more impact your campaigns will have.

Creating a clear, useful, and engaging message

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In 160 characters, every word counts. Literally. Forget the fluff and get straight to the point. But being direct doesn’t mean being dry. You need to be clear, catchy, and above all… useful.

A good marketing SMS is like a good pitch: short, targeted, and action-oriented. It must answer one simple question: "What’s in it for me as a customer?"

Example: "FLASH – 20% off site-wide until midnight! Free shipping on orders over €50. Shop here: lienweb.fr"

You announce the offer, create a sense of urgency, clearly state the value, and add a short link to the website. It’s simple, but incredibly effective.

And if you’re unsure about the phrasing or the tone, test a few variations. Sometimes, one word changes everything. The important thing is to be authentic, consistent with your brand, and impactful.

Creating desire without spamming (and staying within the law)

We’ve all received SMS messages that look like phishing attempts. To avoid being seen as a spammer, there are a few simple rules.

First, identify yourself clearly. Your brand or company name must be visible in the message. Second, don’t bombard your contacts. It’s better to have a well-targeted campaign than a massive, random blast.

And don't forget the legal requirements: every marketing SMS must offer an opt-out option. Including a phrase like "Reply STOP to 36XXX" is mandatory (and it builds trust).

Playing fair pays off. Your customers feel respected, your brand image stays positive, and your communication gains credibility. It’s a win-win.

Adding a clickable link: the call to action that changes everything

Sending a message is good. Driving action is better. A marketing SMS without a call to action is like a storefront without a door. You need to invite people to click, order, or reply.

Including a short link is essential. It should lead to a specific page: a product page, an offer page, a contact form, a pre-filled cart, etc.

And if possible, personalize this page for the campaign. There’s nothing worse than landing on a generic page when the message promised a targeted promotion. Small detail, big difference.

Good to know: according to Esendex, SMS campaigns with links get an average click-through rate 20% higher than those without. Not bad for a few extra characters, right?

And even better: use tracking tools to see who clicks, when, and from what type of device. This data will help you refine your future campaigns.

Timing is everything: the right message at the right time

Sending great content is one thing. But the timing can change everything. An SMS sent on Monday at 7 a.m. won't have the same impact as one sent on Friday at 6 p.m.

Timing is a subtle art. For a flash sale, it’s best to target the hours when your customers are most receptive: lunch breaks, the end of the workday, or the start of the weekend. Test, measure, and adjust. Every audience reacts differently.

Conversely, avoid off-peak or early morning hours. There’s nothing worse than a marketing message received at 6 a.m.—except maybe a message without a clickable link!

Good timing can make the difference between a message being read, clicked, or simply ignored. Think about your own habits: when do you open your messages? That’s often a good place to start.

Measure, adjust, improve: the winning cycle

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Effective SMS marketing is also about evolution. Don't just hit send. Analyze your campaigns and look at your click-through, conversion, and opt-out rates.

Test several versions of the same message (this is called A/B testing). Change the wording, the link, the emoji (if your audience likes them), or the send time. You’ll be surprised by the results.

And if a campaign doesn't work? No big deal. The important thing is to learn from every send. SMS is instantaneous, but it’s also a channel that rewards consistency.

Pro tip: some platforms allow you to create highly detailed reports for each campaign. Use them. The better you understand your performance, the more relevant your future actions will be.

160 characters, but endless possibilities

You might think SMS is limited. But when used correctly, it’s an incredibly powerful communication tool. It reaches your customers directly, builds a personal connection, and can boost your sales if you integrate it intelligently into your marketing strategy.

  • Know your audience before crafting your message
  • Be clear, be helpful, and include a clear call to action
  • Follow the regulations (play by the rules)
  • Choose the right timing, measure, and test

With a little practice, you’ll see that 160 characters is more than enough to get the right message to the right contact at the right time. And you can do it all from a simple phone.

And who knows? Your next marketing SMS might just become your best conversion tool. It just goes to show that sometimes, the shortest messages go the furthest.

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