It's very hard to do when you have to add it to every existing product. I don't know how you will do it in bulk.
Example: If you google precious diamonds you see this as the title and description:
List of diamonds - Wikipedia - that is the meta title
https://en.wikipedia.org/wiki/Listofdiamonds - URL
This is the meta description:
24.78-carat (4.956 g) A 24.78-carat Fancy Intense Pink diamond and, until the sale of the Sweet Josephine diamond in November 2015, it was the most expensive jewel ever sold at auction. Previously owned by Harry Winston and an unnamed private collector, and bought by Laurence Graff (November 2010).