How does invitation to treat and offer work for online purchases?

In online purchases, an "invitation to treat" refers to the display of products on a website, signaling to customers that they can make an offer to buy those items. When a customer selects a product and proceeds to checkout, they are making an offer to purchase. The seller then has the right to accept or reject this offer, typically by confirming the order and processing payment. Only upon acceptance does a binding contract form between the buyer and seller.