Topic
Tauba means "repentance," a plea to Allah for forgiveness of sins. The need for "repentance" is mentioned in many ayats of the Quran.
Confession in the Abrahamic religions, a confession of one's sins before Allah. Confession implies repentance and a decision to try to avoid sin in the future.
Etymology
The root tā wāw bā (ت و ب) is used in Quran 87 times.