These pages provide guideline properties used on multiple pages, or are likely to be used on multiple pages. In case these properties are changed over time, creating a template for them makes future updates much easier.
If an entire page of content is desired, it may be better to create a fully transcludable page. They are tracked under Category:Transcludable pages.
Pages in category "Guideline properties"
The following 7 pages are in this category, out of 7 total.