IMPORTANT QUESTION about selling on AMAZON.

Hi,

I am considering becoming a seller on AMAZON. My question is does a customer have to purchase only from my seller profile (ie. Other sellers on Amazon section) or will they just place an order on the main product page and the order will come to me automatically?

Please see the screenshots:

https://paste.pics/c3225bc59e62065df9d894b5174cb1d2

​

Thank you!