What are proxies and how do I configure them with Axios in React Native?

A proxy server acts as an intermediary between your React Native app and the API server. If your app needs to connect to a server behind a firewall or network restriction, you might need to use a proxy. You can configure a proxy in Axios using the `proxy` option: `axios.get('https://api.example.com/data', { proxy: 'http://your-proxy-server:8080' })`.