Final answer:
IM is useful in business for its real-time presence indication, collaborative functionalities, and potential cost savings. However, security should also be managed carefully.
Step-by-step explanation:
IM (Instant Messaging) is increasingly used by businesses and its employees for various reasons. The first reason is presence, which refers to the ability of employees to see if their colleagues are available in real-time, facilitating immediate communication. Another important aspect is functionality; IM offers features like group chats, file sharing, and video conferencing that are essential for collaborative work. Furthermore, cost savings are significant with IM, as it often reduces the need for expensive phone calls, travel for meetings, and can even lower email volume, thereby saving time. While IM does bring benefits such as convenience and potentially reduced downtime, concerns like security should also be carefully considered, ensuring that business communications remain protected.