In order to create a custom Proxy URL, you need to follow the following steps:

1. From the Dashboard, go to Manage App
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2. Manage App will open a popup in which, scrolling down you'll find an App Proxy section. Under this you'll find the App Proxy URL. You can customize it by clicking the Customize URL button.

3. A pop-up will appear with the App Proxy URL options. You can choose one of the options already available, the shorter being the extension “/a/” after your store URL
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4. You can now customize the section “perfect-product-finder” that comes in the following section in the URL [store URL]/a/perfect-product-finder . You can change this into anything, for example “x”. Now your base URL will become: [store URL]/a/x . The quiz slug you generated when creating the quiz will be added on to this.

Please bear in mind that due to limitations with the Shopify API, our app won't be able to show this new URL inside your quiz flow editor, on the Publish page. The Preview link also won’t work because it uses default URLs originally created instead of custom ones.
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The new URL will work normally and can be added to your store same as the one originally generated by the app, so what you will need to do is to replace the section [storeURL]/tools/perfect-product-finder with the custom proxy URL you just created. In our example, this is [store URL]/a/x