Wikipedia:Training/core/Sandbox edits for stubs
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For expanding a short article that doesn't provide encyclopedic coverage (known as a stub), beginning from a sandbox can be helpful. Here you can write and rewrite before going "live."
Small articles that are expanded by a factor of five within a short period (and are well-referenced) are also eligible as "Did You Know" entries (a section on the Main page); working in a sandbox until reaching that threshold may be a good idea.