You could examine how they structured and positioned that content, track which search phrases they focused (or failed to), and see what types of websites are linking back to it. In order to avoid undesirable content from the lookup indexes, website owners can instruct spiders to not crawl sure documents https://open.spotify.com/track/2EurvjkcgNuBs0YHd17Yfk?si=b7e161c53f334885