Choose your package ecosystems — npm, pip, Docker, GitHub Actions — and an update schedule, and the tool generates a dependabot.yml v2 with one update block per ecosystem.
Yes. The generated file includes one update block per ecosystem you selected — Dependabot runs each on its own schedule.
Yes, as a starting point — review names, paths, and details against your actual project before committing.
No. Everything is built client-side in your browser; nothing is sent anywhere until you commit it yourself.