Why Access Control is Important for Your Business Access control is a vital part of the security of your business. It ensures that control is maintained when it comes to restricting only authorized people entering the business property. In fact, access control affects everything we do in our daily activities, whether we realize it or not. Leaving your house to go to work involves many aspects of access control, such as turning on the house alarm or unlocking your car. However, in the field of business security, it involves a lot more in the way of sensitive areas and information.