Help:Purge
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The purge function is a handy to clear a page's server cache. This forces the wiki software to rebuild it completely.
Some pages use transclusion to incorporate subpages. If you can't see the transcluded pages properly, purging might help.
We have a handy template for this: {{purge}}. All you have to do is add something like {{purge|Purge this page's server cache}} to the page.