An IP address can reveal certain information about you, for example where you’re located (approximately) and what internet-connected devices you use. Your ISP or mobile carrier can also see what websites you visit.
If you’re concerned by this, you need to hide your IP address. The most common and user-friendly methods to do this are to use a web proxy, or a virtual private network (VPN).
A web proxy (usually available via a website or web application) lets you route internet traffic from applications on your device to a proxy server, and then on to your web destination. Proxies are typically setup on an application by application basis, e.g. a web browser.
When you connect to a proxy server, your IP address will change to one assigned by the server. This masks your true IP address while using a proxied application, and the websites you visit will only see the proxy's IP address.
A VPN is a better software version of a web proxy, which you can install and use on most devices.
Like a proxy, VPNs divert your internet traffic through a private server, which assigns you a different IP address.
Unlike proxies, secure VPNs will use sophisticated connection protocols (OpenVPN, WireGuard, etc.), and encryption (e.g. AES 256-bit), to further secure your internet data transfers. A good VPN will also ensure all of your internet traffic is sent via the VPN Server, ensuring all activity is anonymized, regardless of the application.