I can highly recommend installing the Web Fragment Finder:
This will allow you to see all integration points in Confluence with the corresponding location values to be used in the Web Item Module
What @remie said.
Had to share that when I saw the email notification for this topic and spotted the dog picture, I thought that @ChongJingHong may have been reviving What are the rules about posting pictures of your dog on the Developer Community? - #12 by mpaisley