Public Wi-Fi refers to wireless internet access that is available in public spaces, such as cafes, libraries, airports, and parks. It allows users to connect their devices, like smartphones and laptops, to the internet without needing a personal data plan. This service is often free or provided at a low cost, making it convenient for people on the go. While public Wi-Fi is useful, it can pose security risks. Since these networks are open to anyone, sensitive information, like passwords and credit card details, can be vulnerable to hackers. Users are advised to take precautions, such as using a virtual private network (VPN) or avoiding sensitive transactions while connected.