For most products, copy plays a huge role in increasing your add-to-cart rate.
Norman Nielsen study found that 20% of users fail to successfully complete a purchase because of incomplete or unclear product information.
• What kind of doubts or hesitations do your visitors have?
• After reading everything, what's still unclear?
Copytesting will give you answers, so you can improve your product page copy.
The ecommerce product page test can be used to test anything, but the default questions on that test are set to be ecommerce-specific.