What is the difference between Errors, Warnings and Reviews in Accessibility?

By Jennifer Chadwick
Note: This article refers to our old accessibility product. Information on our current next-generation Accessibility product can be found in Learn more about Accessibility NextGen
Errors: Issues which have been automatically determined as failures to meet success criteria in the Web Content Accessibility Guidelines (WCAG).
Warnings: Issues which have been automatically determined as failures to meet best practices in the Web Content Accessibility Guidelines (WCAG).
Reviews: Potential failures to meet best practices or success criteria in the Web Content Accessibility Guidelines (WCAG), which can only be confirmed by a manual inspection.