The core purpose of using Wi-Fi in network connectivity is to enable wireless communication between devices, allowing them to access the Internet and share data without physical connections. Wi-Fi technology uses radio waves to transmit and receive data over short distances, facilitating mobility and flexibility within homes, offices, and public spaces. This is crucial for supporting numerous devices like smartphones, laptops, and IoT gadgets simultaneously. The convenience and efficiency of Wi-Fi networks play a significant role in enhancing user experience and connectivity.