What it is means "Provide a use installable .ZIP"

Help me please. I had soft reject with this issue:

  1. Provide a use installable .ZIP of your theme: http://envato.d.pr/wKAvQb

You need to create a zip file of the highlighted folder on the screenshot. The main zip package must contains the existing folders + this installable zip file of your theme.
This same zip file must be assigned to the “WordPress Theme” option of your item :

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Thank you!