This is a great question that Google’s Matt Cutts answers here. If you’re building an image-heavy site, you will still need to ensure you have copy. Matt discusses an interesting halfway house using 521 free fonts at Google Web Fonts.
The founder of Attwood Digital, Mark is a digital marketing veteran having been working online since before the dotcom boom. He created the world's first online skip hire service in 2003, has created multiple online courses, lectured on digital marketing and even written a book on the subject. He is also an ICO advisor and crypto-enthusiast.