Clicking checkout button it redirect to here. https://checkout.netsuite.com/s.nl/c.578860/sc.4/.f?ext=F
But where could I find this page template?
what c.578860 mean and sc.4 means?
c.578860 denotes your company Id
c stands for company and 578860 is your organization Id
sc.4 denotes site category Id
sc stands for site category and 4 denotes site category Id
When you select an item and add to cart the sitecategory id will be appended to the checkout URL along with your organization id.