YIFY is one of the torrent sites which is used for downloading games, applications, videos, songs, and movies. But YIFY torrent was banned. So, yify websites make a new website with another domain name called Mirror sites of YIFY. These are used to running YIFY sites where these are banned. Use these sites and enjoy your stuff.
Related article: http://famousbollywood.website2.me/blog/yify-proxy-mirror-sites-list