How do you estimate User Stories, and which methods do you prefer?

Short answer: Common estimation techniques:

Real-world example (ShopNest)

Agile for ShopNest means ship a thin checkout slice every sprint, get feedback, then improve—not a 6-month big-bang release.

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.