Instant messaging (IM) is a type of communication where two or more people participate in a real-time conversation, messaging each other back and forth over their computers, tablets, or mobile devices.
To IM, you often use a standalone application or embedded software. IM sessions can occur between two users in a private, separate space, or in a larger channel where multiple parties are in. Usually, instant messaging involves a quick, back-and-forth style of communication — making it unique from email communication. IM’s immediacy feels familiar to in-person conversations, whereas email is meant to reflect the virtual version of writing a letter or sending snail mail.
Instant messaging apps — or clients — come with a handful of features that help you understand when someone is available to talk. You can see whether certain team members are online usually through certain icons or color-coded signals that indicate their presence. As the technology has evolved, many instant messaging solutions offer advanced features such as file transfer, image sharing, note taking, and more.