← DictionarySchema Markup
also called structured data markup
Code added to a page describing its content type to search engines.
Telling Google what kind of page this is.
What It Is
You will find Schema Markup in the Technology layer, alongside the rest of Search Tech. What it actually refers to is code added to a page describing its content type to search engines.
It is a mechanism rather than an opinion: set up properly it behaves predictably, and set up badly it fails just as predictably. Once it is defined that clearly, arguments about it usually stop.
How It's Used
Most of the time Schema Markup is used in build decisions, tooling and the plumbing behind a working system. It is usually discussed together with Structured Data and On-Page SEO. The practical test is whether it is configured, documented and actually working.
Why It Matters
Ignoring Schema Markup rarely fails loudly — it fails slowly. When it is unclear, small technical debts compound into a rebuild. It is worth pinning down before anyone builds on top of it.
Think of plumbing. Nobody admires it, everybody notices when it leaks. Telling Google what kind of page this is.
Termshift™
How the meaning shifts depending on who is using it, and where.
Practitioners use Schema Markup as shorthand and expect no explanation — code added to a page describing its content type to search engines.
Outside the industry, most people would just say: telling Google what kind of page this is.
The Bottom Line
If you only keep one thing about Schema Markup: telling Google what kind of page this is. Everything after that is detail.