While the terms "Wi-Fi sharing" and "Wi-Fi tethering" are often used interchangeably, there's a subtle distinction.
Wi-Fi tethering typically refers to a device, like a smartphone, creating a local hotspot to share its cellular data connection with other devices.
On the other hand, Wi-Fi sharing can be a broader concept, encompassing scenarios where a device shares any Wi-Fi connection, be it cellular or an existing network.
In essence, Wi-Fi tethering is a specific form of Wi-Fi sharing that involves creating a hotspot for others to access the internet via the host device's cellular data. The terms may vary in usage and context.