If you have updated your website but you still see the old pages, double check that you uploaded your files to the correct place. If you are sure that you uploaded your site correctly, but you still your old content, try clearing your browsers cache then press CTRL F5 while viewing the site.
If that doesn't work it's possible your ISP is caching the pages, that means you won't be able to see the new page until they update their cache.
Another possible reason is that you haven't removed the old index page. If it has a different file extension to the new one, the old file may still be taking precedence. For example, if you upload a file named index.html and a file named index.php, the index.html file will be displayed when you visit the site. If you want the index.php page to be displayed you would need to rename or delete the unwanted index.html page.