How do I install a visitor ID tag on Plain HTML?
On Plain HTML, your visitor identification tag goes in: <head> or before closing </body> tag in HTML file. The install itself takes minutes; the part that goes wrong on Plain HTML is below.
Where the tag goes
- <head> or before closing </body> tag in HTML file.
- 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 Plain HTML?
No build tooling; third-party scripts execute immediately; vendor may provide only compiled code without source maps.
How do you verify the tag fires?
Open HTML file in browser, open DevTools console for errors, check Network tab for external resource loads.
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.