How do I install a visitor ID tag on Shopify?
On Shopify, your visitor identification tag goes in: Settings > Customer events > Create custom pixel (Pixels tab). The install itself takes minutes; the part that goes wrong on Shopify is below.
Where the tag goes
- Settings > Customer events > Create custom pixel (Pixels tab).
- Paste your vendor’s tag snippet exactly as issued. Do not wrap it in extra script tags or reformat it.
- Publish or deploy, then verify (below) before trusting data.
What breaks visitor tracking on Shopify?
Custom pixels run in Shopify's pixels sandbox and HTML is not supported: the tag must be added as JavaScript through a custom pixel, not pasted as a <script> tag.
How do you verify the tag fires?
Go to Settings > Customer events and verify pixel appears in the list and fires in browser DevTools Pixels tab.
Then run through the labeled QA checklist before you rely on the numbers, and set expectations with the match-rate calculator — no vendor identifies every visitor.