SMS marketing has a craft to it.
Behind every text is a set of aspects that affect how your message is built, what it costs to send, and whether it lands the way you intended. This post covers what every SMS marketer should know to write messages that are clear, cost-efficient, and worth reading.
What Is an SMS Segment?
To your subscriber, a text looks like just one message, however long. Behind the scenes, though, SMS messages are broken into segments at the network level, transmitted independently, and reassembled on the recipient's device as a single message.
Rule of thumb: Standard text gives you a 160 character-limit per segment. Add an emoji, smart quote, or special character and that limit drops to 70. See our Guide to Segment-Billing to learn more about encoding and how SMS segments are calculated.
Why do Segments Matter?
Segments matter because each one has a cost. A four-segment message costs four times as much to send as a one-segment message, even though your subscriber receives it as a single text. If the cost of a longer message seems high, it's worth asking: could you tighten the copy? Remove a special character? Drop an emoji? Just make sure any trimming doesn't come at the expense of clarity or impact.
What to Check Before You Send
Use our platform's preview tool to monitor character count and segment count as you draft, don't guess.
Watch for smart quotes if you're not drafting your message in the Community platform. In Word, Google Docs, or a notes app, make sure to look for curly apostrophes and quotation marks that can add hidden characters and swap them for straight versions.
Factor in your links, even shortened URLs count toward your total.
If you're sending in multiple languages, check how your message encodes before you scale.
Test before you send at scale. Sending a test to yourself before a large campaign is a small step that catches surprises.
How to Craft High-Impact SMS Messages in 1-2 Segments
Keeping messages within 1-2 segments doesn't just reduce cost, it tends to drive better engagement and conversion too. Brevity forces clarity, and clarity drives action. Here's how to nail it.
Lead with the value, not a warm-up. Skip the intro and get straight to the point. Your reader should know why they're reading within the first three words. "Starting lineup just dropped: [link]" and "New track just released, listen first: [link]" are great examples because it clearly articulates the point of the message.
Cut anything that doesn't earn its place. Read your message back and ask: does this word move someone to act? If not, cut it. "Tour dates are live: [link]" is all you need. Everything else is noise.
Drive one action, not three. The fastest way to kill a conversion is giving someone too many things to do. Pick your single most important CTA and commit to it: "Reply to vote for tonight's MVP" or "Watch the trailer now." One message, one move.
Use emojis with intention. A well-placed emoji adds personality and can do the work of a whole word. Here are a few examples: urgency ("Sale ends tonight ⏳"), curiosity ("New trailer alert 👀"), hype ("Tickets are selling fast 🔥"). The key word is intentional. One emoji that fits beats three that are just decoration.
Watch your length triggers. Long links, special characters, and personalization variables can quietly push you into a third segment. Use short links, keep punctuation simple, and always test before sending.
When in doubt, come back to the formula: Hook + Value + CTA. "New episode just dropped 👀 Fans are already reacting! Watch now: [link]" is 10 words and does everything it needs to do.
When to send a longer message
One or two segments isn't a rule. Some messages genuinely need the extra space, and that's fine. A longer send is worth it when:
- You have questions to ask: well-structured questions, answer options, and line breaks make choices easy to scan and typically drive higher response rates than compact texts
- The content requires logistics: event details, confirmation information, or instructions that would create friction if left out
- The relationship calls for warmth: a milestone message, a personalized offer, or a welcome message where a few more words feel human rather than transactional
- The context genuinely helps: situations where a subscriber would be confused or lose trust without a bit more explanation
The question to ask: is every word doing real work? If yes, use it. If not, trim it.
The best-performing texts are clear, concise, and action-driven. If a word doesn't add value, cut it.
Pro Tips
- If your message is longer than 2 message segments, it's often more cost-efficient to send as an MMS. Run a quick calculation.
- Use artificial intelligence to draft your texts. SMS platforms like Community have AI Message Generators to help you create engaging SMS messages and better connect with your audience.
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