A flavor smoothener that is useful to use in concert with other flavors- "Smooth" will round out any harsh edges and provide a thick, satisfying mouthfeel.
It will soften the high notes of your blend while boosting your background notes.
On it's own it has a mild fruity taste.
The main ingredient of TFA Smooth is Triacetin. Triacetin is often used in the food industry to mask harsh tastes and in e-liquids should be used from 2 drops per 10ml up to 2%. Any more than 2% will severely mute your flavours