Gold, silver, platinum, etc occur in free state. Since Gold, Platinum and Silver are the least reactive metals, hence they are found in free state in nature.
A metal in chemistry is an element that creates positive ions readily and has metallic bonds. Metals are sometimes represented by a cloud of delocalized electrons as a lattice of positive ions.
Metal is very strong and durable and therefore is used to make many things. These are used for making automobiles, satellites, cooking utensils, etc.