What your public IP address reveals
Your public IP is the address your internet service provider assigns your connection to reach the outside world, and every device on your home network shares it when it talks to a website. On its own, it can point to your ISP and roughly which city or region you're in, but not your name or exact address. This lookup runs entirely from your current request; nothing is stored.
Dynamic vs static IP addresses
Most home internet plans use a dynamic IP that can change whenever your router restarts or periodically at your provider's discretion. Business connections and some premium residential plans offer a static IP that stays fixed, which matters for anyone self-hosting a server or needing a consistent address for remote access.