My wordpress site take a too long time to load. How to fix it and make it very powerful running?

i have one website WWW.houseshop18.com and it takes too long time to load and make a request on server.

for your kind of information i also tell you that i have godaddy hosting for this website and my server run on windows OS.

my friend told me to compress all css and js file if possible which will reduce the page load time. is it right? and if it is then tell me how to make it successfully?

will you please tell me the other reason behind this problem?