If you want to add comments to the app item for any create/ update action performed on the app item then this is what your basic flow configuration should look like.
This flow takes an app as the first step and comment app in the second step so that comments on app item can be automated for any create /update action performed on the app. Similarly more such flows can be created using different apps available.
Step 1: Event
Click on "+Add Step", select "Event" and then "+Add".
Select Application to whose items you want to add the comment. Select event and filters for on what action you want the comment to get added.
Step 2: Comment
Click on "+Add Step" ,select "New Comment" and then click on "+Add".
Type in the comment in the comment box. You can also make use of the item field values to write the comment, from the option available on the right.Choose the comment target (Application in this case).
Step 3: Workflow Type
Select the workflow type for when you want the comment to be posted on the item.
Step 4: Save> Test> Publish
Save the workflow after all configuration by clicking on the Save button ,Test it and Publish the workflow.
Go to the next article: Adding Task to app items