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[Maximilian Schwarzmüller] Now to conclude this module,

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there is one last special page I want to have a look at,

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and that's the 404 page.

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If I enter something slash something here,

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then I get the 404 page and a 404 error

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because we're not supporting that value.

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We're not supporting that path.

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Now, of course you might want to ship your own 404 page

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with your own content and style.

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And Next.js makes that easy.

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You just need to add a special file in your pages folder.

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So on the root level of your pages folder,

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next to this underscore app JS file and this index JS file,

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and here, in this folder,

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we now want to add a 404 dot JS file

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and it must be named like this because Next.js will

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then always load the component returned

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by this file or export it from this file

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when a 404 error arises.

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So here we can have our not found page

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and in there simply return a div where I say page not found.

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And of course the content is up to you.

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And then here I export this.

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And by doing that, by adding this page to special file,

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if I now reload local host free thousand slash something

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I see my custom not found page.

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So that is how you can customize that.