Competition
In Etsy SEO, competition refers to how many other listings are competing for the same search term. A keyword with thousands of competing listings is harder to rank for than a more specific term with only a few hundred.
Smart keyword strategy balances search volume against competition. Broad terms like "necklace" may get huge traffic but are nearly impossible for a new shop to rank for, while a long-tail phrase like "dainty gold initial necklace for mom" has less competition and often converts better because the shopper intent is clearer.
eRank reports a competition figure for keywords so you can spot opportunities where demand is reasonable but the number of competing listings is low enough to give your shop a realistic chance of being seen.