Differences between advertisement and unilateral contract
The overall difference between a unilateral contract and an advertisement is the manner in which it is accepted.
Under the law of contracts, the general difference between a unilateral contract and an advertisement is that the manner of accepting a unilateral contract is accomplished by the performance of the terms specified in the offer, while an advertisement is treated as merely an opening to negotiate the terms of an offer to a contract.
Mutual Assent
Formation of a valid contract, which is legally enforceable, requires mutual assent to the same terms by the parties and consideration. (“Consideration” is outside the scope of the present discussion.) Mutual assent is generally accomplished by one party making an offer to another and acceptance of that offer by the other par...