On GitHub:?

Short answer: You’ll see a green “Verified” badge on signed commits. Why it matters: Verifies authorship for open-source contributions. Helps in regulated environments (e.g., fintech, healthcare). Prevents supply chain attacks via spoofed commits. Real-world example: In a security-conscious org, all commits to the main branch are required to be GPG-signed — GitHub enforces this with branch protection rules.

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.