Hi,
"Tip" means "confirm".
This is required for all kind of deals so it can not be removed.
Eg. A merchant create a deal with customers, if 50 people buy this product, merchant give a 50% discount. So if at least 50 people buy it, the deal is confirmed/tipped/on, buyers will get the product with only 50% of original price. But if the number of buyers is less than 50, the deal is cancelled.
Regards,
Hung