SMS Testing

SMS has the highest open rates of any marketing channel, but also the tightest constraints. With 160-character limits and per-message costs, testing copy efficiency is critical. Small wording changes (reordering a benefit, trimming a phrase, leading with a verb) can meaningfully shift click-through and conversion rates.

How liftstack handles SMS testing

• Create SMS body snippets with 2–3 variants
• Character count guidance built into the snippet editor helps you stay within limits
• Attribution via shortened tracking URLs with lf_cid parameters
• Opt-out rate guardrails protect your SMS subscriber list

Why SMS testing matters

Every SMS you send has a direct cost. Unlike email, where sending an extra variant costs nothing, SMS charges per message. That makes efficiency critical: you need to know which copy approach converts best so you can maximise return on every message sent. Testing also helps you find the right balance between brevity and clarity. Sometimes a shorter message wins because it feels less cluttered; sometimes a longer message wins because it gives readers enough context to click. The only way to know is to test.