AccyMissing or empty page title
WCAG 2.4.2 (A) · EN 301 549 9.2.4.2
The page has no <title>, or it is too short to identify it.
Why it matters
It is the first thing a screen reader announces on load, and what distinguishes one tab from another. Without it the person cannot tell whether the page loaded what they expected.
It is also the headline that appears in Google. There is no reason to leave it empty.
How to fix it
Write a title that identifies the page, then the shop: "Organic cotton t-shirt — Shop".
Does your shop have this failure?
Check for free, along with the other 54 rules. No sign-up.