How do I make a custom 404 page?

How do I make a custom 404 page?
https://aaron0301.netlify.app
How do I make a custom 404 page? cause the current one is a bit bland

Hi @Aaron03011 Welcome to the Netlify Community :netliconfetti:

Are you asking how to write the HTML, CSS, and JS to make a non-bland page, or how to make said page show when someone visits a non-existent path on your site?

@Aaron03011 Upload your custom 404 page in the root directory of your site and Netlify will serve it instead of the generic page.