Are you curious about how long does the green dot stay on Snapchat » ? If yes, then you can read this column. Simply, the green dot is known as the online activity that can stay visible up to 24 hours. It is when the user last activated it. Hence, it is not like someone is actively using their Snapchat account at that time. But, according to the green dot, if it is showing on your account, then someone can see it like it is activated with your account. For further information, you can click the provided link here and collect more information about it.