To connect your marketing channels to the UpStackified Shopify app, follow these steps:

1. Open the UpStackified app in your Shopify store and navigate to the "Settings" tab.

2. Click on "Marketing Channels" under the "Marketing" section.

3. Select the marketing channels you want to connect (e.g., Facebook, Google Ads, etc.).

4. Follow the prompts to authenticate and connect your accounts for each marketing channel.

5. Once your accounts are connected, you can start tracking your marketing performance data in the UpStackified app.

Note: Depending on the marketing channel, you may need to grant the app certain permissions or access to your data in order to connect your account. Follow the prompts in the app to complete the connection process for each marketing channel.