Having had the same conversation more than once, I decided to put the basic info into an infographic, from Etsy’s own article on the subject: https://www.etsy.com/uk/help/article/34234144469
How Search Works Infographic
And a link to the PDF (A4 sized) which you’re free to share, but not modify.
Whilst I’ve got you….
Here’s a set of Travellers Notebook refills in my wife’s Etsy shop: