Someone emails you a password or URL. You want to copy someone's email address from a webpage to your email application. For many reasons, cut, copy and paste are essential functions that many people use each day to work in Windows. They're so easy to do that they'll soon be almost instinctive.
Find the text you want to copy or cut and paste, and highlight it with your mouse.
Hit "Ctrl" and "C" to copy or "Ctrl" and "X" to cut. Now the text is in the clipboard; keep in mind that you can have only one piece of text in the clipboard at a time.
Position the cursor where you want to paste the text, and press "Ctrl" and "V" to paste.