Read the following screen display and click "OK".

Step 3: Setting the Trigger for Gmail and Configuring Trello
Click on the area within the red frame below.
When the screen for selecting the linked account and action appears, confirm that the Gmail account you are linking this time is correct and click "Next".

A screen like the image below will be displayed, so enter the area within the red frame.

・Trigger activation interval: You can choose from 5 minutes, 10 minutes, 15 minutes, 30 minutes, or 60 minutes. The selectable time intervals vary depending on the plan, but a shorter setting is generally recommended.
・Label: Clicking on the input field will display the output.
You can enter from the suggestions as shown in the screen below. Choose 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 appear, 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 output.
You can set the content of the card to be added in Trello, so use the output and enter it.

Once you have entered the information, 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.
Check if the flow bot starts correctly.

The template introduced this time is here↓