An instant messenger is a software application that allows users to send and receive real-time messages, without having to leave the program they are currently using. It enables text-based communication between two or more people over the internet or an intranet. Instant messaging has become popular as it provides a quick and easy way for individuals to communicate with each other in a convenient manner. The messages are transmitted immediately, hence the name "instant messenger". This type of communication is widely used in businesses, schools, and personal settings, allowing people to stay connected and exchange information quickly without having to rely on email or phone calls.