The traditional model of in-house, ad hoc IT Support (sometimes known as break-fix) worked for a long time, but as networks became more complex, problems appeared.

For example, an employee might accidentally delete an important file, causing hours of downtime while IT staff restored it from a backup. With an RMM in place, such problems can be quickly fixed remotely without taking the entire network offline.
In addition, RMMs can automate many time-consuming tasks, such as patch management and software updates, which frees up IT staff to focus on more critical tasks.