An .htaccess file is a text file that contains directives which tell a web server how to behave in specific occasions. It must be put in the folder in which these directives should be executed. Numerous script-driven applications employ this sort of a file to operate correctly - WordPress and Joomla™, for instance. You can use this kind of a file with customized content as well and do lots of things - block an IP address, an entire network or specific websites from accessing your site, set custom made error pages which will show up instead of the server-generated ones if a visitor encounters some error on the website, redirect a domain or a subdomain to a new web address, create a password-protected area plus more. With an .htaccess file, you shall have far better control over your online presence.