Birth, marriage and death records, sometimes referenced to as vital records are invaluable to your genealogy search. Since they were typically recorded around the time of the event they are often considered more accurate than other types of records. These records include information like the event date and place, parents' names, occupation and residence.
Not only will you find information about a particular relative search, often information about other near relatives will be included. For example, birth and marriage records include names of parents and divorce records list the names of children.