What is this link that I just copied, I really don't want to open it if I don't know what it is.?

a href="http://us.js2.yimg.com/us.js.yimg.com/lib/pim/r/photomail/install/2005_10_29_1/ymb_setup_mini_us.exe" rel="nofollow"http://us.js2.yimg.com/us.js.yimg.com/li…/a