Who was involved in RTB? How that's working?

I am studying SEO optimization, and came across such a thing as RTB, does the auction affect the place in display ads?

It is an integral part of programmatic advertising, not directly related to SEO. It's an auction-based system for buying/selling ad impressions in real-time. While RTB can influence where your display ads appear, it doesn't impact organic search rankings. Always good to understand the broader digital landscape, though!