An offer is an expression of willingness to contract made with the intention of becoming binding once accepted. An offer can be made in writing, verbally, expressly, or impliedly. It can be made to a specific individual or group. However, certain pre-contractual communications like advertisements, price displays, and tenders are considered invitations to treat rather than offers. An offer ends upon acceptance, rejection, counteroffer, lapse of time, failure of condition, death of the offeror or offeree, or revocation communicated to the offeree.