Plugin signing and publishing procedure

Hello!

I have two questions on the plugin publishing procedure.

I want to understand what happens after clicking the SUBMIT button in the publishing form. Does anyone from SDL test the plugin, and if so, how long does it take. Or does it published immediately after submission?

The second question is about SDL digital signature on our plugins. Do we have to submit these plugins to SDL for signature prior to publishing, or will SDL sign them during the store publishing process?

Thanks in advance.

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