Time to First Action

Time to First Action is a metric that measures the amount of time it takes for a user to perform their first meaningful action within a product or service, such as signing up, clicking a button, or completing an initial task. Reducing the time to first action is important for improving user engagement, as users are more likely to continue interacting with a product if they can quickly accomplish something useful.

Time to first action is the onboarding metric that most directly predicts whether users will activate. Users who take a meaningful action in their first session are dramatically more likely to return — they've experienced something, not just read about something. Optimizing onboarding to get users to their first meaningful action (creating a record, sending a message, completing a setup step) faster consistently improves day-7 retention more than any other onboarding change.

Slack's onboarding is designed to get users to send their first message as quickly as possible — specifically within the first session. Their internal data showed that users who sent at least one message in their first session returned at 4x the rate of those who only viewed the interface, making time-to-first-message the core metric guiding their onboarding design.