Online selling implies the absence of touch or feel of the products for customers. They purchase products based on the online shopping experience given to them, which includes accurate information in terms of pictures and descriptions.
So copywriting is an important part of online experience as the words included form a part of the feel of the product from a customer’s point of view. The same product written with a feel-good factor would probably sell more than one with no description at all.
Here’s an infographic showing how to sell more with effective copywriting.