Streak's Email Tracking service for Gmail allows users to know when their emails are opened, providing immediate notifications via browser or email. With a simple toggle in the Gmail compose window, users can easily activate or deactivate tracking. The tool organizes tracked emails chronologically, helping users identify who to follow up with based on email engagement. Ideal for businesses and professionals, it enhances communication efficiency by enabling targeted follow-ups with recipients who have viewed previous emails. Streak is free to start and integrates seamlessly with Gmail.