In his book Visual Impact Visual Teaching, Timothy Gangwer cites evidence that 90 percent of all data that the brain processes is visual. Additionally, it’s commonly held that 65 percent of people are visual learners, and the human brain purportedly processes visualization 60,000 times faster that it does written content.
However, when you think about it, the fact that we are visual learners first and foremost makes perfect sense from an evolutionary standpoint. Human beings were able to articulate thoughts through visuals long before the invention of the written word. People love visual content, and the more enriching the content, the deeper and more impactful the impression that your content will make. Additionally, given the fact that your average user will only give you about 10 to 20 seconds worth of a page visit to make an impact with your content, it follows that you had best make every single solitary second count.
http://contentmarketinginstitute.com/2014/08/visual-content-effective-brand-storytelling/