Normally a slash indicates a folder on the web site and the server will look for and serve an index.html or index.php file in that folder. Without the slash ind

Normally a slash indicates a folder on the web site and the server will look for and serve an index.html or index.php file in that folder. Without the slash indicates a filename, even if it doesn't have an extension. That said, there are many sites that rewrite URLs allowing anything to be anything.