That's cute. I've never seen an ad for a wikipedia page though.
The real purpose of ads is to convince people to buy things that they otherwise might not have, so that companies can make a profit.
Take the https://www.theguardian.com/. I've got adverts for:
- an electric toothbrush. I already have one. But surely the new model is better!11!
- London apartments. I live 170 miles away and have no desire ever to live in London. But maybe I should because London is so amazing!11!!
- Remitly ("send money to India online"). I do not know anyone in India and have no need to send money there.
- "70% off" "Store Clothing", whatever the hell that is. I have plenty of clothes. But maybe I need more and to be more fashionable!11!!