Search tens of millions of resources in the mainline DHT network. Nothing except metadata of the resources is hosted here. You need a bittorrent client that can handle magnet URI links to actually access the resources. All modern clients do!
Similar to public trackers, the mainline DHT network is also public, as opposed to private trackers. To protect your privacy and avoid receiving ISP 'warnings' or DMCA emails, be sure to use a P2P-supporting VPN service with high anonymity such as Windscribe (free plan and discount available). Better yet, set up a personal seedbox at a third party and download through an anonymous VPN!