Read the following screen display and click "OK".

Step 3: Set the Trigger for Gmail and Configure Trello
Click on the area within the red frame below.
When the screen to select the linked account and action is displayed, confirm that the Gmail account to be linked this time is correct, and click "Next".

A screen like the image below will be displayed, so set the items in the red frame.

・Trigger interval: You can choose from 5 minutes, 10 minutes, 15 minutes, 30 minutes, or 60 minutes. The selectable time interval varies depending on the plan, but a shorter setting is generally recommended.
・Label: Clicking on the input field will display the options.
You can enter from the candidates as shown in the screen below. Select any label you like.

Once you have entered the content, click "Test" → "Save".
Next, configure Trello.
Click on the area within the red frame below.

The API connection settings screen will be displayed, so configure the settings to add a card in Trello.
There are notes below the input fields, so proceed with the input while referring to them.

In the description field, you can use the retrieved value.
You can set the content of the card to be added in Trello, so use the retrieved value to input.

Once you have entered the input, click "Test" → "Save".
Step 4: Turn ON the Trigger Button and Verify the Integration between Gmail and Trello
Finally, click "Turn ON Trigger" to complete the automation settings.
Verify that the flow bot is activated correctly.

Here is the template we introduced this time↓