Instant messaging (IM) is a form of real-time communication between two or more people using typed text over the internet. Surveys show that 42% of internet users use IM, with 36% using it daily. IM is most popular among younger age groups. Libraries are increasingly offering IM reference services to attract young patrons and communicate with users and staff. The document discusses trends in IM usage and provides recommendations for libraries to consider IM outreach.