For apps which need it, everything generally happens in both places. The server-side render fetches all the appropriate data and displays a fully rendered versi

For apps which need it, everything generally happens in both places. The server-side render fetches all the appropriate data and displays a fully rendered version of the page. That being said, I think you should carefully consider whether server-side rendering is necessary for your application before adding it. It does complicate your stack and is not worth it unless either first-load performance or SEO are important to you.