My parents were in their early 70's when they first got a computer and started using email and the Internet. (My dad even signed up for an affiliate marketing program and began running PPC ads, but he wasn't very successful).
Mom was in her late 70's when she started using Facebook. (She's in her mid-80's now and the computer's become way too confusing for her.) Her most common post was "Why do my posts keep disappearing?" She'd also post comments like, "Sorry you have the flu. LOL."
When I asked what she thought LOL meant, she relied, "Why, Lots of Love, of course."
So, thankfully, my parents are no longer on social media (or running PPC campaigns).