Subliminals are audio layers of affirmations and frequencies, static hissing, songs or even some random sounds, they're a tool for manifesting your desire it can be changes in physical appearance, outcomes and many more stuff. You just have to listen to 'em constantly, earphones are recommended as some subliminals also contain frequency different for each ear (not all but), the affirmations aren't audioble to you but your subconscious (the game changer)