What can I do to make Chrome stop doing this?

So today, I see a tab on my phone from Chrome (which I didn't see what app it was from at the time, but discovered later) and it said "You have three messages from Emily." Now, I have a friend with the same name, so I click on it. I suddenly see that it's from a random porn website and people have... show more So today, I see a tab on my phone from Chrome (which I didn't see what app it was from at the time, but discovered later) and it said "You have three messages from Emily." Now, I have a friend with the same name, so I click on it. I suddenly see that it's from a random porn website and people have been randomly sending me nudes, and I have no idea how the hell it happened. All because I tried to download a song from a random website. Any advice about what to do?