how do i empty junk email from my Mac air system Mac Mod Monterey

If it is really useless email then right click on junk email folder and pick erase. You can also set the junk box to empty when shutting down mail in your preference mailbox behavior.

Luckypierrepmk wrote:

How do I empty my junk email or should I even do it

Two ways.

Refer to First image

Second image