The new PlanetScale Netlify integration allows developers to streamline database management by simplifying the process of connecting and deploying applications on Netlify that use a PlanetScale database, reducing manual connection string copying and pasting, and enabling seamless deployment with different branches for various deploy contexts. The integration also works seamlessly with PlanetScale's Fetch API-compatible database driver, allowing developers to connect to their PlanetScale databases from within Netlify Functions using the `@netlify/planetscale` library. To get started, developers can visit the PlanetScale integration page in the Netlify docs or watch a past tech talk for more information.