The basics of SEO (or search engine optimization) is not as "impossible" to learn as some people like to think.
Search engine optimization (SEO) is the process of affecting the visibility of a website or a web page in a search engine's "natural" or un-paid ("organic") search results. In general, the earlier (or higher ranked on the search results page), and more frequently a site appears in the search results list, the more visitors it will receive from the search engine's users. SEO may target different kinds of search, including image search, local search, video search, academic search, news search and industry-specific vertical search engines. Read more about this here:
http://en.wikipedia.org/wiki/Search_engine_optimizationAnyone can learn the basics of SEO. The search engines, like Google, do update their search algorithm now and then but changes are documented and possible to keep up with.
The most basic part of SEO is the use of words or text on each Web page in a way that is recognized by the search engines and adds value to your web page. This includes the use of keywords that clearly describe what each web page (or listing ) is about. There are databases that store real search queries (words and phrases) all over the Internet. These databases cab be used to research keywords - words that are used frequently to look for whatever it is that you are selling. Keywords are one very important part of SEO and the best place to start.
Here are a few Etsy forum posts that might help:
About one Google Algorithm change:
http://www.etsy.com/teams/7722/business-topics/discuss/8523243/SEO Myths You should NOT believe:
http://www.etsy.com/teams/11352/relevancy-and-seo-for-all-etsy-shops/discuss/11211672/page/1/