← Dictionary404 Page
also called not found page, error page
The page shown when a requested URL does not exist.
What people see when a link is broken.
What It Is
404 Page sits on the Website side of the work, in the Pages area. What it actually refers to is the page shown when a requested URL does not exist.
It is a label with a settled working definition, so the value is in using it the same way every time. That is the version worth keeping, because it survives contact with a real project.
How It's Used
Most of the time 404 Page is used in site builds, page structure and the technical decisions underneath them. It normally appears alongside Redirect, URL and Site Structure. The practical test is whether everyone in the room means the same thing by it.
Why It Matters
Ignoring 404 Page rarely fails loudly — it fails slowly. When it is unclear, the site still launches — it just quietly underperforms. Clarity here removes a surprising amount of downstream argument.
Picture a word everyone in the room has agreed to use the same way. What people see when a link is broken.
Termshift™
How the meaning shifts depending on who is using it, and where.
Professionally, 404 Page carries the narrow meaning: the page shown when a requested URL does not exist.
Explained to someone with no marketing background, 404 Page is what people see when a link is broken.
The Bottom Line
Treat 404 Page as a decision, not a description. What people see when a link is broken.