You can go up and search for brands and see the kind of ads that the brands are running.
You can also search by products, events, terms etc.
This is a combination of Advertising, Branding and Performance Marketing.
In olden days it was easier to convert with an ad campaign because at the time there were much less ads and it was a novel thing to buy from an ad but in the present scenario people start to think now that there are so many ads and they have to decide for themselves what is right or wrong.
“Our goal is to match the right ad to the right person at the right time. This is different than a traditional auction because the winner isn’t the ad with the highest monetary bid, but the ad that creates the most value.” - Facebook
👆This is what the algorithm is all about.