Notes before Installing Apps:
Before installing, we recommend creating a backup of your present theme. Creating a backup allows you to quickly and easily return to the previous theme setting.
Visit Duplicating Themes for detailed instructions.
Step 2: Click the “Add app” button
Step 3: App store login
Step 4: Confirm App installation by click “Install App”
Step 5: Then check out the new app! Your newly installed app will live in the App section in your Shopify Admin page