What’s a marketing/advertising tool that’s actually worked for you?

I’m not looking for someone one who **created** a tool that claims they can put me in front of 500 potential investors or the 47th person to tell me they developed a tool to measure my ASO. I would like to hear from the people who created an **app** and what tool did YOU use to market? What worked, what didn’t work?

I’ll go first - I made the mistake of doing Facebook advertisements and the only reactions I got were from a bunch of old people.. and what I developed is a social drinking app tailored to age range 21-40s, not 75 year old Kimberly who can’t work her phone and now sends me a Good Morning and Good Night message every day 😅