What is URL (web address)?
The address of a page on the web — and the single most useful thing to check before trusting a site.
The part that matters is the domain just before the first single slash: in 'secure.paypal.com.verify-account.net', the real site is 'verify-account.net', not PayPal. Scammers exploit this constantly, so learn to read addresses right-to-left from that first slash.