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E-Commerce Checkouts Need to Mark Both Required and Optional Fields Explicitly (Only 9% Do So)
Both our checkout usability study of 15 major e-commerce sites, our mobile e-commerce usability study of 18 leading mobile sites, and our most recent large-scale eye-tracking study of checkouts, have all confirmed the same thing: checkout processes and long sign-up forms need to mark both the required and optional fields explicitly.
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