What is Roku's secret menu and how do you unlock it?

Roku devices include hidden menus that provide direct access to developer settings, network diagnostics, ad preferences, platform details, HDMI configuration, channel information, and factory-reset functions. Each menu is unlocked by a specific remote-button sequence, such as Home × 3 > Up × 2 > Right > Left > Right > Left > Right for Developer Settings. These shortcuts enable sideloading apps, adjusting network and ad settings, viewing performance metrics, and performing resets without using the standard interface.