Who already click on Facebook ads

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I'm trying to promote a new business on the Internet and one of my friend advice me to use Facebook ads to show up my business. The problem is i'm not sure if a lot of facebook users used to click on ads, which can be a disadvantage for me. Can you tell me how you see the facebook ads show to the right side on your profile. did you ever click on one ads? Thanks in advance, your answere will be useful.