This template is substituted very frequently, so changes to it will be widely noticed. Please test any changes in the template's /sandbox or /testcases subpages, or in your own user subpage. Please consider discussing changes on the talk page before implementing them.
Use on templates that are substituted very frequently.
Parameters
No parameters. Just place {{Frequent substitution}} on the template that is substituted frequently, such as block templates, user warning templates, and welcome templates to get the message above.
Template documentation
