could you please explain the steps?

[j2l]

Steps
Start by creating a project in the PWA Builder.
http://app.localhost:8000/app/pwa-project
Connect your Frappe site to the builder and give access to your Doctypes.
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Select a Doctype and easily drag and drop fields from its metadata to create app screens.
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Export your project and download a Frappe App.
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Install this Frappe App to your actual site.
Access your new pwa on https:///