The Suggested Match should work for most scenarios of Guide targeting on elements. In the event it doesn't, use the Choose Parent or Custom CSS options instead.
This option refers to the parent element of the suggested match, and its parent elements all the way up to the <body> tag. This is helpful for broadening a target area.
This option means you can input CSS selectors. The Tagging Aid Chrome Extension can help you find something that works.
For more information regarding selectors, refer to these help articles: