If you see an email from “PayPal” claiming it needs your account information, delete it immediately. If you open the email for some reason, don’t click the link in it. Instead of launching a website, it launches an application that collects your personal information and sends the info back to the bad guys.
In general, never give out your personal or account information over email. A reputable service won’t ask for information this way. Shred paperwork containing your personal info if you want to protect yourself from identity theft.