SMS marketing delivers returns that make other channels look like rounding errors. The numbers back this up: businesses earn an average of $71 for every $1 spent on SMS, with open rates consistently above 98% and most messages read within three minutes (Omnisend, 2026). But high open rates alone don't guarantee conversions. The difference between a campaign that gets ignored and one that drives revenue comes down to strategy, timing, segmentation, and relentless testing.