Sometimes you need to mirror your mobile screen in to your desktop. For that you may have to install some heavy softwares.
But you can just connect your mobile phone to your desktop and easily can mirror your phone and you can also control your mobile phone with your desktop machine.
Because the project is open source on github this application is actively made updates to increase the security.
Download the package from this link

And this will download ZIP file and the extract this zip file and then double click on the file named scrcpy.exe

Note :

Connect your mobile to desktop using USB Cable and enable USB Debugging on your phone.

To download and use this application refer this amazing youtube video in hindi https://www.youtube.com/watch?v=dINscOPHDR4
Tutorial in English https://www.youtube.com/watch?v=vyX8ioYbT8I