The hide identity feature is a pro feature provided by  Torrent Pro app. You can find this option in the settings page, under the pro features section. This feature is used to hide your identity to a certain degree. The user-agent will be reset to an empty string (except for private torrents), trackers will only be used if they are using a proxy server, the listen sockets are closed and incoming connections will only be accepted through a SOCKS5 or I2P proxy (if a peer proxy is set up and is running on the same machine as the tracker's proxy). NAT-PMP, DHT and local peer discovery are turned off. To increase more security