What is the purpose of an alarm company yard sign?

The primary purpose of an alarm company yard sign is to serve as a good burglar deterrent. When a potential intruder sees a yard sign indicating that a property is protected by an alarm system, it can act as a significant psychological barrier. Knowing that the property is monitored and armed with security measures makes it less attractive for burglars, who typically look for easy targets.

While informing neighbors might be a secondary benefit and potentially attracting customers may be a goal of the alarm company, these do not capture the main intention of the sign. The increase in property value, while a possible long-term effect of having security systems, is also not the fundamental purpose of placing a yard sign. Therefore, the most relevant and accurate answer reflects the effectiveness of the sign in deterring criminal activity.