You probably should do some reading about SEO; it will help you in general with your whole shop.
The SEO for Etsy Newbies thread in this team:
https://www.etsy.com/teams/10713/etsy-relevancy-seo-and-statsis pretty helpful.
In short, descriptions have nothing at all to do with Etsy's search. For a relatively competitive search like "shawl pin" (where there are at least 25 pages, and I would guess more, of optimized listings), it is impossible to guarantee that you will stay at the top of the search. It is much more beneficial to focus on getting views for a lot of different searches that are more specific than "shawl pin," and taking the views you get from large searches like that as a bonus :)