The formation of pronominal adverbs in German follows a fairly simple principle. First comes the base da- (for statements or references) or wo- (for questions), and then the required preposition is added. The result is forms like damit (“with it”), davon (“from it”), darauf (“on it”), and also womit (“with what?”), wovon (“about what?”), worauf (“on what?”).
In this way, a small prefix turns an ordinary preposition into part of a new word that replaces an entire phrase. Important: such words are never used for people — only for objects, ideas, or events. While in Russian or English we often repeat “with this”, “about this”, “to this”, in German everything is reduced to one compact word.
For learners, this system may seem confusing at first, but in practice it saves a lot of time: instead of a long repetition, you just put damit or womit — and the idea is expressed quickly and precisely.