Instant messaging, often shortened to simply "IM" or "IMing," is the exchange of text messages through a software application in real-time. Instant messaging differs from ordinary e-mail in the immediacy of the message exchange and also makes a continued exchange simpler than sending como saber quem visitou meu perfil no whatsapp e-mail back and forth. Most exchanges are text-only, though popular services, such as AOL, MSN Messenger, Yahoo! Messenger and Apple's iChat now allow voice messaging, file sharing and even video chat when both users have cameras. Some IM applications can use push technology to provide real-time text, which transmits messages character by character, as they are composed. More advanced instant messaging can add file transfer, clickable hyperlinks, Voice over IP, or video chat.

The WhatsApp messaging application is the widely used instant messaging application used for sending one on one and group messages to your contacts- it has made life simpler for people especially those who are always on the move. It is a cross-platform mobile messaging app which allows you to exchange messages without having to pay for SMS. In addition to basic messaging the users can create groups, send each other unlimited images, video and audio media messages.