In the SPA technology, only a single page, which is index.HTML, is maintained although the URL keeps on changing. Unlike traditional web technology, SPA technology is faster and easy to develop as well.
In conventional web technology, as soon as a client requests a webpage, the server sends the resource. However, when again the client requests for another page, the server responds again with sending the requested resource. The problem with this technology is that it requires a lot of time.