Wireless networks are relatively easy and inexpensive to set up and as a result can reduce the cost of a network implementation, simply because they reduce the requirement for cable or wires to be installed.
While many buildings have cabling already, a wireless network allows people to work more flexibly, especially those who may need to move from room to room or are hot-desking. It’s so much easier, for example, for an individual to carry a laptop from their desk to a presentation area without having to find and plug in to a network point.