Annie, you can also do what I do, which is use a method that my company teaches its clients. This applies to Google, but since most of the world searches on Google for things it wants, it's a great way to pick keywords AND to find out what's hot.
First, are you familiar with the Google Keyword Planner? It's a tool that Google offers free because it hopes you'll buy ads. You plug in some phrases you're considering, and it tells you how many searches each phrase gets per month, and also gives you other related phrases.
A good primer on using the tool is here:
https://www.etsy.com/teams/11352/relevancy-and-seo-for-all-etsy-shops/discuss/13988472/page/1Once you know how to use it, you'll get lots of ideas. Then take the next step in my method: Take the number of searches from the Google Keyword Planner, and multiply it by 12 to get annual searches instead of just monthly.
Then Google your keyword phrases with quotes to eliminate results that include your words scattered around a page instead of all together -- example, if you don't use quotes around "throw blanket," you'll get pages with "throw" and "blanket" in separate places and the page actually has nothing to do with throw blankets.
You'll get a number at the top left of the search results page that shows you how many other pages on the web are also using your exact phrase.
Now take the annual number of searches and divide it by the number of existing pages that you got. This actually quantifies supply vs. demand in a numerical way. We call it the Keyword Competitive Index. If you get a number higher than 1, that means there are more searches for the phrase than there are pages that deliver it. That's solid gold!
Anything less than 1 means supply has outstripped demand, and your competition is harder to fight.
There are always surprises when you do this! That's how, for example, I learned that teal handbags are hot (and, when I then searched in on Etsy itself, learned that competition here is low). I keep a list of items that I can make in my niche that I discovered are hot through this method.
(One thing to keep in mind is that in *very* competitive markets, like jewelry and handbags, you're lucky to find anything over 0.3. You take what you can get, of course!)
Anyway, being older with my daughters and their friends not quite ready to get married, the whole burlap wedding linens thing was a total surprise to me until I was researching tablecloths.
Then there's the fact that "fashion" after the decade, such as "1950s" is MUCH more valuable of a phrase than "style" -- for ANY decade. Oh, and that 1980s fashion and 1920s fashion are the hottest of the last decade.
Hope this helps! Good luck with it all. My method is a lot of work, but as you can see, it helps you figure out what to sell, AND when you get the tags right, they drive traffic to your listings while you sleep!
