Deploying to Vercel is very easy:

• Create a NextJS project and do an npm run build to confirm that it compiles correctly.
• Create a repository and upload it to GitHub.
• Go to Vercel and sign-up or sign-in using GitHub.
• Create a new project on Vercel and choose the repository from the list of GitHub recent repositories and wait for Vercel to build it and assign a domain.

Previews with branches

Whenever you create a new branch and push it to GitHub, Vercel will detect it and deploy a preview of that branch so that you can see the changes without affecting the production site.

Vercel command-line