Server-side rendering (SSR) is when the HTML for a page is generated on the server and then sent to the client. Client-side rendering (CSR) is when the HTML for a page is generated on the client’s side, using JavaScript.
Both SSR and CSR have their own benefits and drawbacks. For example, SSR is generally better for SEO because the content is rendered on the server before it is sent to the client. However, CSR can be faster and more responsive because the HTML doesn’t have to be generated on the server first.