Of course the design of your website should be visually appealing, you don’t want people to leave your site screaming in horror, but it’s not everything. On top of having a website that’s easy on the eyes, it needs to convey the message you’re trying to present, such as your business objective, plan of action for visitors and the quality content that you’ve been busy creating.
But testing gets complicated because some browsers only run on certain operating systems. Apple Safari runs on iOS and Mac OS, while Internet Explorer runs only on Windows. It's best to take advantage of services like Browsershots or Browserstack. Browsershots furnishes screenshots of your website as it will look in various browsers. Browserstack actually gives you full remote access to virtual machines so you can test your site in the most common environments. Alternatively, you can set up your own virtual machine, but that takes some expertise. (If you're going that route, Microsoft has some tools for developers including a ready-to-use virtual machine at modern.ie.) how to build a website