Marketing a Great Feature No One Notices

Overcast's smart speed reduces the length of silences. How do i show people that this feature even exists? How do i tell them whether they turn it on or not? Should it be default even and then once if they're using it, how do i show them that it's benefiting them? And so that kind of thinking that led me to things like giving it a marketable name and trade marking that name,. Then showing prominently in the u i, huge buttons, smart speed, a little explanation, voice boost, little explanation.