Never click on anything you do not recognize! Ever! Even if you think you recognize it, don't click on it until you are sure!
The only links I click on are from my bank and from my doctor. I know their emails and I know that neither would ever text me a link. (They might text me about going to my email for one.) Friends send me links all the time. I copy and paste them. I also never click on anything at all with my phone. The damned thing is too important to be compromised these days, so it is just not worth it.
As someone who worked with the IT department at a private school, I cannot tell you how many times we had to try and save some teacher's computer because they just could not stop themselves from clicking on something. This would also (on occasion) bleed into the system, causing even more damage and destruction.
Don't. Do. It. 
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