How can I add keywords and a description to my site? I'm running a whmcs script. and what type of code should I use?
You need to EDIT your header file, look in your template/theme folder. You add them in the header tags (<header> and closed header </header>), example below: <header> <meta name="keywords" content="keyword1, keyword2, separate by commas"> <meta name="description" content="Some descriptions of the page"> </header>