Netlify's Deploy Previews feature allows developers to explore the future state of their project by generating a preview URL after submitting a Pull Request. This feature is built on top of Git workflow conventions and uses Netlify's workflow to create a preview that can be reviewed and revised before merging into production. The feature has been expanded to include Collaborative Deploy Previews, which adds tools for reviewing and managing feedback on project development, with integrations with various workflow and management tools.