You get an e-mail from a family member or friend and they have sent it to several others in the TO line of the e-mail. And many times the SUBJECT line is blank or possibly contains RE:. To top it all off, they don't type anything in the body of the e-mail. You just see a link. No explanations, just the link. So should you click it? Probably not. If you do, most likely you will be directed to some sort of Canadian Pharmacy selling Viagra or Cialis. What you don't see will harm you in ways you won't like. Malware is installed that makes your PC now under the cyber attacker's control.
To stay safe, you must make the correct decisions from time to time. And the one thing you can't do is trust that that e-mail is really from your brother, sister, or your BFF. Always question situations like these. If you are really curious, call them and ask them if they sent you something and if they did, then let them know they need to explain what they are sending you next time.
My advice when it comes to electronic communications is , trust no one. You will be better off if you take that advice.