Free trials let prospects experience the full product without commitment, betting that experienced value is more persuasive than marketing copy. Trials typically last 7, 14, or 30 days and may require a credit card up front (higher conversion, lower volume) or not (lower conversion, higher volume).
The key metric is trial-to-paid conversion, often broken down by activation status: trials where the user reached the aha moment convert at 5 to 10× the rate of trials where they didn't. Trial design is therefore an onboarding problem more than a pricing problem.