What is an Ad Server? How does Ad Serving Work?

It may seem like a pretty elementary question, “How are ads served on a website?” The process is quite complex and happens in a remarkably short period of time. There are publishers all over the world that provide the relevant, targeted audience the advertisers are attempting to reach. Then there are advertising exchanges throughout the world, though, where advertisers can target, bid, and place advertising. What is an Ad Server Ad servers are the systems