Persian carpet also known as Iranian carpet, is a heavy textile, made for a wide variety of utilitarian and symbolic purposes, produced in Iran (historically known as Persia), for home use, local sale, and export. Carpet weaving is an essential part of Persian culture and Iranian art.
They represent different, simultaneous lines of tradition, and reflect the history of Iran and its various peoples. 
More than a carpet it also represent an art work in ancient persian style , thats why its also a part of persian carpet collecting hobby to some people. Its an ornamental carpet thats makes your home attractive.