Angular Universal is an essential tool for Angular applications, chiefly known for its ability to perform server-side rendering. This characteristic is the primary benefit of using Angular Universal and is what sets it apart from traditional Angular, which solely supports client-side rendering.
Server-side rendering (SSR) specifically refers to the technique of rendering the application's view on the server rather than in the user's browser. With Angular Universal's SSR, the server generates a fully-rendered page to the client on the initial request. This process significantly speeds up the initial loading time of the webpage, as the user does not need to wait for all JavaScript assets to be downloaded and executed before viewing the page's content.
This is especially beneficial for users with slower internet connections or less powerful devices, and can greatly improve user experience in general. It also improves the site's visibility to search engines since many crawlers struggle to effectively index client-side rendered sites, thereby enhancing SEO performance.
If we have an e-commerce website, for instance, that takes a significant amount of time to load due to its heavy reliance on JavaScript, the application of server-side rendering could be the savior that improves load times. It not only seals in customer satisfaction by removing annoying waits but also gives a positive signal to search engines that users are spending more time on the site, and it's performing well.
However, while server-side rendering with Angular Universal has distinct benefits, it's not a one-size-fits-all situation. It's best suited to applications where SEO is crucial, where the benefits of faster initial page loading outweigh the potential costs of additional server resources, and where the app isn't too dynamic or interactive. Hence, your use case should dictate whether you adopt Angular Universal or stick to traditional Angular for developing your application.
To conclude, Angular Universal's server-side rendering capability is a potent tool for improving initial load times and enhancing SEO. However, like all tools, it's crucial to use it only when it truly adds value.