Squashing commits?

Short answer: Combining multiple commits into a single, more meaningful commit, typically done during an interactive rebase.

Real-world example (ShopNest)

Prefer clear commits: fix(cart): prevent negative quantities instead of update.

Say this in the interview

1. Define — one clear sentence (the short answer above).
2. Example — relate it to a project like ShopNest or your real work.
3. Trade-off — when you would not use it.