Wireless access points (APS or WAP) are network devices that allow wireless Wi-Fi devices to connect to a wired network. They form wireless LAN networks (WLANs). An access point acts as a central transmitter and wireless radio signal receiver. The main stream of APS supports Wi-Fi and is most commonly used in households, to support public Internet hotspots and in business networks to accommodate the proliferation of wireless mobile devices now in use. The access point can be embedded in the wired router or it can be a standalone device.
If you or a colleague use a tablet or laptop to connect to it, you are going through an access point (both hardware and integrated) to access the Internet without connecting it via a cable.