ruby slippers

Noun

idiomatic plural plural-only

(idiomatic) A valuable feature (of software etc) overlooked by the user.

Japanese Meaning

（ソフトウェア等における）ユーザーが見逃しがちな価値ある機能

The new app's ruby slippers were hard to find, but once discovered they made the workflow unbelievably fast.

新しいアプリの見落とされがちな有用な機能は見つけにくかったが、一度見つかると作業の効率を信じられないほど高めた。

Sense（1）

(idiomatic) A valuable feature (of software etc) overlooked by the user.