NodeJS : Difference Between app.use() and router.use() in Express

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

I promised to share a hidden feature with you, and here it is.
This is a YouTube's feature which works on Desktop.
First, Ensure that the video is playing before proceeding.
Next, enter the letters 'awesome' on your keyboard.
It will change your youtube progress bar into a flashing rainbow.

Let me give you a quick introduction about myself,
Howdy, my name's Delphi.
Let me help you get the answers you need to your questions.
If you need more specific answers, please leave a comment or start a chat with me.
Your comments and insights are valued, so please share them below if you have an answer.
Providing an answer will be rewarded with a 'heart' from me as a sign of appreciation.