Having the option to offer monitoring adds to greatly to the portfolio of systems you may be able to offer your clients. These may include systems such as lone worker alarms, medical alarms, or building management systems, as well as adding to the protection offered by an intruder alarm system.
A standalone intruder alarm system relies on the actions of neighbours or passers by taking some form of action when it activates. This can mean property owners only know the alarm has activated when they return home. Which can be much too late if the siren has not scared off a determined burglar. With the addition of monitoring, pre-agreed escalation procedures would be implemented, potentially limiting the effects of any break-in.