While exporting the listing, we add new search terms which are used to find the listing on the Amazon marketplace,
Some of the search terms are the listing's MPN, Brand, Manufacturer, title's words, eBay's item specifics, eBay's primary category.

The search terms contain up to 200 characters.
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You can see the search terms on your Amazon listing, go to Amazon's inventory -> search for your listing -> Edit -> Keywords -> Search Terms. (See below screenshot).

When typing one (or more) search terms on the Amazon marketplace, you should see your listing :)