You may be happy now with the look of your website when you view it with a computer, but you should be aware that your visitors out there may be viewing your site with a handheld device such as iPhone or iPad and seeing a broken site or a horizontal scroll bar which is very annoying. As the owner of the site, you must check to see if your site fits those mobile layouts or there are any problems when displaying the site with them. Here are some tips for you to check within your PC: