Google playstore is the backbone of an android device.
It is like the complete supermarket of apps where one can download the applications of his or her choice.
Most of the applications are available free of cost. It has more than a million apps which is unbelievable. Various high end and interesting games are also available here. If your devoce doesn’t support high resolution games, mid range games of lower maturity are also available here. Apps are of various categories including music, sports, news etc.