What this tool checks
Etsy publishes a maximum title length of 140 characters, and permits up to 13 tags of up to 20 characters each. The checker also finds duplicate tags and missing descriptions. It cannot measure Etsy search rankings.
Worked example
A listing with fourteen tags produces an error. Two matching tags produce a duplicate warning. Clear product titles and relevant unique phrases help shoppers understand your item.
Assumptions and limitations
This is a rules and writing-quality review—not a ranking prediction, current keyword-volume service or account audit.
Reference: Official documentation. Review source updates before relying on rules.