Sounds like a vague question, I know. It's the kind of question that does not get asked enough because people tend to focus on the problem at hand rather than how to make it easy to fix things.
Say you are looking at some automatically generated content. You want to know:
1. Which plugin or widget or whatever caused this to be here?
2. How do I edit the template or shortcode or whatever created it?
3. What pages would be affected if I changed this?
Some systems like Zope/Plone make this kind of information available. Does WordPress give you any way to navigate these kinds of questions?
If you want me to be more specific, you are missing the point.