Remote Debugging – Chrome Developer Tools — Google Developers

The experience of your web content on mobile operates very differently than what users experience on the desktop. The Chrome DevTools allow you to inspect, debug, and analyze the on-device experience with the full suite of tools you’re used to, meaning you can use the tools in your desktop Chrome to debug a page on mobile Chrome.

Debugging occurs over USB and as long as your mobile device is connected, you can view and change HTML, scripts and styles until you get a bug-free page that behaves perfectly on all devices.

Remote Debugging – Chrome Developer Tools — Google Developers.