WAP is a protocol that allows users to access the internet from mobile devices over a wireless network. It was created in 1997 to standardize how wireless technologies could connect to the internet. WAP uses Wireless Markup Language (WML) to display web pages on small screens and works across various wireless technologies like CDMA, GSM, and TDMA. It enables applications for mobile browsing and access to information, emails, games, and more from handheld devices.