Is Z-Wave the same as Wi-Fi?

Excuse me, could you please clarify something for me? I've been hearing a lot about Z-Wave technology lately, and I was wondering if it's the same thing as Wi-Fi? I understand that they both involve wireless communication, but I'm not sure if they serve the same purpose or if they have different applications. Could you explain the key differences between Z-Wave and Wi-Fi, and help me understand when each might be used? Thank you.