In short, account suspension means that you will no longer have any selling privileges. This occurs when a seller has violated Amazon’s policies, terms, or conditions while carrying out his selling activities.
During this time, none of your amazon product listings will be visible to shoppers. Your presence on Amazon basically ceases to exist but fear not because you can appeal to have the suspension lifted and get your account reinstated. Amazon always notifies sellers on account suspension. Depending on the type of account suspension, you can plan your appeal accordingly.