Right before they click, people often hesitate. They might wonder whether they’ll be charged, whether they can cancel or whether they’ll start getting spam.
A short line of reassurance under the button can answer that worry at the exact moment it comes up. For example, “No credit card needed” under a “Start free trial” button tackles one of the most common reasons people hold back. Keep it to one line of small, muted text, so it supports the button without competing with it. And make sure it’s true, since a broken promise at this stage can cost more trust than it gains.
