A single-page application is an app that doesn’t need to reload the page during its use and works within a browser.
Before we go further, there are three abbreviations you’ll see in this article:
SPA - single-page application (like we’ve mentioned above)
MPA - multi-page application (a traditional app that loads new pages when you click a link)
The main advantage of single-page applications is its speed. Most resources SPA needs (HTML + CSS + Scripts) are loaded at the launch of the app and don’t need to be reloaded during the usage. The only thing that changes is the data that is transmitted to and from the server. As a result, the application is very responsive to the user’s queries and doesn’t have to wait for client-server communication all the time.