How does 'Find my iPhone' work after I've activated it?

I lost my iPhone somewhere at home so it definitely has connection. I remember activating the 'Find my iPhone' app in the settings. All I need to know is how to activate it? I need to track exactly where it is or does it just tell me the location is at my house? If it is, please help because my house is way too big to find anything (Not to sound like a show-off). Thanks. X -Relates slightly to iPhone software/mobile phones

There should be a website and you should log in. It should have the option where it makes your iphone beep or something

Http://www.huffingtonpost.com/2011/10/13/icloud-find-my-iphone_n_1009425.html

Go here it tells u what to do. Hope I helped