Please follow the simple steps shown below (click on the image to get it enlarged)
1. Open the URL – https://testAccount.myshopify.com/admin and click on the ‘Apps‘.
2. Click on the ‘Customize your store‘ button.
3. In the search field enter ‘Price2spy’ and click on the Price2spy icon
4. Click on the ‘Add app‘ button
5. Click on the ‘Install app‘ button
6. After that, open your account in the Price2spy, select categories, and click the ‘next‘ button. If no categories are selected, everything will be linked.