One of the key features that Windows Start button provided in previous versions like Windows 7 and Windows Vista was the ability to search for files and applications using the search box in the start menu. However, even though Windows 8 does not include the start button, searching for apps and files is not hard at all.
In order to search for applications, files or even settings, just hit the Windows key and start typing whatever you want to search for. Once you do that, Windows 8 will show you the search menu where you will be able to search for apps, settings and files.
Typing text will display the search results on the left hand side pane. You can easily navigate between app results, settings results and file results by using your mouse or arrow keys in the right hand pane.
Bonus Tip: If you want to browse all the installed apps on Windows 8, hit the Windows key and then start typing something. Once you are on the search screen, just hit the escape key and Windows 8 will list out all the installed apps to you.