What's the difference between client-side and server-side A/B testing for Shopify?

Client-side A/B testing for Shopify executes experiments directly in the user's browser using JavaScript. It focuses on the front-end aspects visible to users such as content and appearance of the page, ensuring the user interface is intuitive and bug free. Server-side A/B testing is a more back-end process. It involves experimenting outside of the user's interface. The server generates and serves the variations directly. Before the page is rendered, the server determines which variation a user sees.