Supercomputers are not needed for your average PC usage that exploits gaming, social networking, and daily official work. Supercomputers are the next generation of computers that cover complicated processes such as task management and performances.
Supercomputers were introduced in the 1960s in the USA and were the fastest made by Seymour Cray. The first machines were highly advanced and complicated. During the 1970s, the vector computing concept with specialized math units came into existence. Vector computers took over since then and remained dominant into the 1990s. The USA has long been a leader in the supercomputer field but was later challenged by Japan and China. As of June 2016, China topped the list on TOP500 supercomputer list and claims to have the fastest supercomputer called the Sunway TaihuLight.
These innovative machines are made of a plethora of processors and operated by esteemed scientists in laboratory facilities.
Below is an infographic post of everything you ever wanted to know about supercomputers.

Image Credit: US Department of Energy