SMS Testing

Every SMS you send costs money, so the copy that converts best protects your margin on the channel with the highest open rates of all. The 160-character limit and the per-message charge make efficiency the whole game. Small wording changes shift click-through and conversion rates: reordering a benefit, trimming a phrase, leading with a verb. Knowing which version wins lets you spend each send on the line that earns its cost.

How liftstack handles SMS testing

• Create SMS body snippets with two or three variants.
• Lean on the character-count guidance in the snippet editor to stay within the limit.
• Attribute clicks through shortened tracking URLs carrying lf_cid parameters.
• Protect your SMS subscriber list with opt-out rate guardrails.

Why SMS testing matters

In email an extra variant costs nothing, so there is little pressure to be lean. SMS charges per message, which means efficiency decides return: you want the copy that converts best on every send. Testing also settles the brevity-against-clarity question that teams argue over. A shorter message sometimes wins because it reads clean; a longer one sometimes wins because it gives enough context to click. The only way to know which holds for your audience is to test it.