I put this post in the section "Website Design: HTML, PHP, CSS ..." because it is the one that seems to me the most appropriate. It could be also  in design or marketing.

I looking a little information : Most common advice is :

 

Optimize your title tags and use unique meta descriptions

Use descriptive headers for clarity

Link to internal pages to create a good internal linking structure

Use image alt attributes

Never copy product descriptions from other sites

Use rich snippets

I think the article must be important and need to consume lot of time

 

Know your target audience

original content and not copy
Sell the benefits about the product

Avoid using filler words

Tell a story
Don’t forget to optimize your product pages

 

You can look this article :
https://tinuiti.com/blog/ecommerce/product-descriptions/

Thank you @Carole, the link is very interesting.

It will help me.

Yes, nice article. 

It explains correctly what it must mak inside the product description.