Samsung rejected my app

Unity Engine
1

Hi ,
When i upload my app to seller.samsung they rejected my app ,the resign is

“This application uses debug key for application signing : [EMAILADDRESS=android@android.com, CN=Android Debug, OU=Android, O=Android, L=Mountain View, ST=California, C=US] It does not allow using debug key for application signing to release application. You have to create your own private key and sign your application using it.”
what is application signing for android ? how do i solve this? Please help me am new to seller.samsung store and this is my first game.
Thanks

2

It explains what you need to. You need to use your key for release, not the debug one.

3
4

Thanks for your soon replay i’ll check this.

5

Please give any video tutorial for this…