Template variable
Definition
A template variable is a placeholder in a reusable page pattern that reads a source value and inserts or formats it in a URL, title, heading, metadata field, body section, or another rendered output. Variables are rendering mechanisms; they are not proof that two generated pages provide different value.
Why template variable matters in programmatic SEO
Variables make one template reusable across a large page family, which is the practical advantage of programmatic generation. The danger is assuming that visible variation equals meaningful differentiation. Swapping `{{city}}`, `{{product}}`, or `{{integration}}` can produce unique strings while leaving the underlying answer unchanged.
A useful variable should connect to a source field with a clear role. Some variables identify the page, some shape stable URLs, and others expose facts that change the answer. The quality of the page family depends on that source contract, not on the number of placeholders in the template.
A simple example
A location template might use `{{city}}` in the H1 and `{{city|slug}}` in the URL. Those variables identify the page. A separate `local_constraint` field could change the body because regulations or service rules differ by location, while `service_available` could decide whether the row is allowed to generate at all.
If the only source value that changes is `city`, the template may create many distinct URLs without creating distinct answers. Adding the city name five more times does not solve the missing evidence.
Common misconception
“Adding more template variables automatically makes a page more unique. A page can contain many substitutions and still be functionally interchangeable with its siblings.”
How pSEO Guard handles template variable
The pSEO Guard Page Matrix Generator resolves `{{column}}` variables from matrix data and supports formatting modifiers such as slug output. When a template references an unknown column, the unresolved placeholder remains visible instead of being silently removed.
That failure mode is deliberate because the audit can then report the broken placeholder or missing source value. The goal is to keep bad evidence observable until a reviewer fixes the source contract or decides that the row should not generate.