CSS Based Design – Imagine being able to separate your content from your presentation. For the technically advanced, it makes the pages lighter and leaner. CSS based designs provide the flexibility of changing the content, without touching the presentation. The biggest advantage is that the content is accessible to all browsing devices from the computer to web enabled mobile devices. CSS based designs decrease your loading time and makes it more search engine friendly. Its immensely useful for SEO (Search Engine Optimization) purposes.