Netlify has introduced Deploy Contexts, a feature that allows users to customize settings during the development process by creating a set of configuration options called Deploy Contexts. These contexts can be applied to any deploy on Netlify and go beyond changing environment variables, allowing for changes in build commands, base directories, and publish directories. Users can create predefined contexts such as Production, Deploy Preview, and Branch Deploy Contexts, which can be overridden by specific branch names. To use these settings, users will store them in a new file called netlify.toml, a plain text file that lives in the root of their Git repositories. This feature aims to provide flexibility and customization options for users, making it easier to manage different deployment scenarios.