Anything that you publish online can show up on Google. This is why it’s so important to consider everything you publish. For example, I recommend never publishing images of your home with the address showing, or providing personal information in online forums.
On Facebook, if your post audience is set to Public, it can show up in a Google Search. The same goes with photos you post online.
You should also never publish your credit card number, social security number, and private contact information.
It might seem paranoid, but you could be providing too much information. Believe me, internet trolls exist!