From your Shopify admin, go to Online Store > Themes.
Find the theme that you want to edit and click Customize.
In the left-hand toolbar, click Theme settings.
Click the Progressive web app.
Enable: turn on/off this feature.
Name and/or short name: you must provide at least the name or short name property. If both are provided, the short name is used on the user's home screen, launcher, or other places where space may be limited. The name is used when the app is installed.
Icon: when a user installs your PWA, you can define a set of icons for the browser to use on the home screen, app launcher, task switcher, splash screen, and so on. Your icon size must be at least 512x512 pixels(recommend PNG image).
Display: you can customize what browser UI is shown when your app is launched. For example, you can hide the address bar and browser chrome. Games can even be made to launch a full screen.
Opens the web application without any browser UI and takes up the entirety of the available display area.
Opens the web app to look and feel like a standalone native app. The app runs in its own window, separate from the browser, and hides standard browser UI elements like the URL bar.
This mode is similar to
A standard browser experience.
Background color: pick a color that is used on the splash screen when the application is first launched on mobile.
Theme color: sets the color of the toolbar, and may be reflected in the app's preview in task switchers. This setting will be also used for the meta-theme color specified in the document head even you turn off the PWA feature.