Use case to use ignoreParticipant vs Auto Approver in Rule's Action

Summary:

We have a requirement where invoices from a specific source should be auto approved. No approval should be required for those invoices. We already have some rules defined in different serial and parallel stages of invoice WF.

I want to know when should we use ignoreParticipant_v2 method versus Auto Action Approver in rule's Action. What's the difference between two?

Thank you.

Regards,

Rajat

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