is providing a link to a fake
webpage (which may link to other fake pages) which looks like one of a trustworthy company, in order to fraudulently take personal information - for example a website appearing exactly like one of PayPal
's in order to obtain credit card details.
Checking the URL in the address bar of the browser may not be sufficient, as, in some browsers, that can be faked too. The file properties feature of the browser may disclose the real URL of the fake webpage.