NodeJS : Express.js Benefits to using Router vs App.use routing?

To Access My Live Chat Page,
On Google, Search for "hows tech developer connect"

Here's a secret feature that I promised to disclose to you.
This is a YouTube's feature which works on Desktop.
First, Make sure the video is currently in playing mode.
Next, enter the letters 'awesome' on your keyboard.
You will see a flashing rainbow instead of a regular progress bar on YouTube.

Let me give you a brief introduction of who I am,
Welcome, I'm Delphi.
I am at your disposal to help you with any questions you have.
If you have specific questions that need answers, please don't hesitate to comment or chat with me.
Please feel free to leave a comment below if you have an answer or insights on the answer.
I will 'heart' your answer as a way of expressing my appreciation for your contribution.