The full form of htaccess is Hypertext Access. It’s used on Computing ,File Extensions in Worldwide

The .htaccess file is a configuration file that controls how a webserver responds to various requests. It is supported by several webservers, including the popular Apache webserver used by most commercial web hosting providers.

.htaccess files operate at the level of a directory, allowing them to override global configuration settings of .htaccess directives higher in the directory tree.

With the use of the .htaccess file, you can control many aspects of the Apache webserver (and its many variants). Below, you will learn everything you need to know set up special error pages, password-protect directories, redirect, and much more.

Using a subset of Apache’s http.conf settings directives, .htaccess allowed a system administrator to restrict access to individual directories to users with a name and password specified in an accompanying .htpasswd file.

While .htaccess files are still used for this, they are also used for a number of other things which we’ll cover in this guide.

Apache HTTP Server Tutorial: .htaccess files: https://httpd.apache.org/docs/current/howto/htaccess.html