The deed is an instrument by which the buyer obtains title to the piece of property being sold. A deed comes in many forms. The most common source of passing title is called a warranty deed. The seller warrants that he has a good and clear title and guarantees that his predecessors have no interest in the title.
There is also a quit-claim deed. This is used to obtain a release from a person who is believed to have some interest in or claim to the property. By this form of deed, the grantor "quits" any claim he might have.