If a visitor click on product from the link how will be my commission calculated?

1. If a visitor click on any product from the link How will be my commission calculated?

Commission is applicable only on a successful conversion and not on clicks.

2. If a user clicks on another product the information for that link is still stored ?

Yes, information is stored when the user first clicks the basic link. Later if user clicks on as many products as he want, the information remains there. Conversion will track only after user book a successful order.