Most websites are designed backwards: a beautiful layout first, real words crammed in later. Content-first design flips that — and the result is a clearer, more convincing website.
Words do the selling
Your copy is what actually convinces people. Designing around the real message means the layout supports the argument instead of fighting it.
Less rework
When design starts from real content, you avoid the painful late-stage rebuilds that happen when the words don't fit the boxes. It's faster and it converts better.