Gmail, launched in 2004, revolutionized the way we think about email. Google's innovative approach to email, with its generous storage capacity, threaded conversations, and robust spam filtering, quickly made it a favorite among users. Gmail's popularity grew rapidly, and by 2012, it had surpassed Hotmail as the most popular free web-based email service. Today, Gmail remains one of the leading email services, with over 1.5 billion active users.