What is access control and why its important? 

Access control is a means of controlling who enters a location and when. The person entering may be an employee, a visitor or a contractor and they may be on foot, driving a vehicle or using another mode of transport. The location they are entering may be, for example, a site, a building, a room or a office.We tend to call it physical access control to differentiate it from access control that prevents people from entering virtual spaces – for example when logging into a computer network. And, although one of its primary uses is to increase security, a physical access control system can offer many other benefits too. Including the improved efficiency of your business processes and site or building management.