There's been a lot of debate about whether or not A+ content (also known as Enhanced Brand Content) affects SEO on Amazon. Amazon has publicly stated that A+ content doesn't have an impact on SEO, but they suggest in the A+ content module that it "Improves organic SEO and traffic."
We've tested this ourselves and found that A+ content does indeed affect SEO. For example, if you add 100 Spanish characters behind a single photo of your EBC, it will index within 48 hours. We've tested this thousands of times, and you can do it yourself to see the results.
If you want high-quality A+ content that's designed to improve your SEO and drive traffic to your Amazon listing, check out our services at My Amazon Guy. We do it right.