You can upload your website files either using the file manager, that is built in your cPanel account or with the help of FTP client software by connecting to your hosting account with your cPanel username and password. There is also a QuickInstall function in your cPanel Software/Services section, with the help of which you can easily install your desired scripts like Blog, CMS or eCommerce software by performing several clicks, for example Wordpress, Joomla, Drupal etc..