Common examples of invitations to treat are goods displayed on supermarket shelves: the presentation of the goods by the customer amounts to an offer which is accepted by the cashier.
By analogy, the description of goods on a Web page advertisement can be regarded as an invitation to treat, so long as the party putting the information on the Web page intends that he needs to acknowledge any responses. For this reason Web page hosts will often state the procedure to be followed for a binding contract to come into existence.
The second element of the creation of a contract is communication of an equivocal acceptance of the offer. Any qualification on the offer is likely to be regarded as a counter-offer.

