Folders in parentheses that organize routes without affecting the URL.
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Understand the problem
nextjsroute-groupsroutingapp-router
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Attempt it yourself
Sketch your approach before reading the solution — that's what interviews test.
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Study the solution
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Give it an honest attempt first — then compare your thinking with the full walkthrough.
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Read the code
Two sections, two layouts, clean URLs
app/
(marketing)/
layout.tsx # marketing shell
page.tsx # → /
pricing/page.tsx # → /pricing
(app)/
layout.tsx # authenticated app shell
dashboard/page.tsx # → /dashboard
# Neither (marketing) nor (app) appears in the URL.05
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