How true are ad placement?Is he cheating?

I noticed my husband has received dating app ads on his Facebook and TikTok and I’m starting to wonder if that’s just a coincidence or it’s there for a reason. It’s happened on two separate occasions like a month apart. Like is he looking up certain stuff that bring those ads or what is it? I feel like in my heart he isn’t cheating but i feel like i just can’t ignore that. From what I know, ads pop up based on what you like, see, use... so I’m hoping it’s not anything bad. For peace of mind and for my anxiety’s sake someone please help..