The largest and most obvious advantage of installing home security cameras is as a deterrent. In addition to making burglars and other criminals less likely to target a home, cameras can help if a crime is committed. They can also provide important information in the event of other disputes or problems.
To achieve the greatest deterrent effect, security cameras should be prominently placed, though it is best to place them out of reach of the ground level to make it more difficult for burgers to destroy or disable them. Even cameras that are harder to see can help by providing a sense of security, which is especially helpful for people who have previously been victims of a crime or who live in an area undergoing a rash of home burglaries. Though ultimately cameras cannot fully prevent crime, they do help, and they can help police and other authorities identify perpetrators of crimes that do occur.
Cameras can also provide help in other instances. In particular, they can help authorities or private attorneys in traffic incidents, domestic disturbances, and lawsuits. This strength can also be a weakness, as security cameras potentially might record something that the homeowner would prefer remain forgotten, including unsavory or illegal activities.