When Google released Gmail, it changed the way people use email. It was the first web-based email system to break out of the mold set by the desktop email clients that came before. Beginning as a sort of secret club that you had to be invited to, it took off right from the start.
Not only was Gmail faster, with a much more advanced and easier to use interface, the way Gmail handled and sorted email was a giant leap ahead. Gmail left behind the hard to follow, chronological lists of messages and sorted everything into nice, neat, individual conversations. Many people didn’t realize at the time just how revolutionary this change was.