Vague error messages in your forms are killing SaaS trial signups. In one moment, users enter an email, password, company name, and click submit. Next, they're greeted with an "invalid input" message and no fix nearby. They leave not out of frustration, but because the form gives them nothing to work with. Error messages aren’t fine print; they’re feedback loops. Clarity is activation. Every error message either accelerates a user toward “first value” or slows them down when
