[Seeking Info with Windows & Application Tabs in CCleaner]

Is there a website where I can find out what all those items mean when I click on the tabs?

 

Example, under WINDOWS - the browsers are listed, as is SYSTEM and ADVANCED.  I would like to know which are safe to click and which are not... 

 

Again, is there a location where I can see all those listed defined?

 

Thanks for any help you can offer. 

[Duplicate files keep only newest (or oldest, etc.)]

I'm a total newbie to this forum and somewhat computer challenged. Just saying.

 

I love CCleaner, and the tools section in the program.  I found out I have over 14,304 MB of pictures on my laptop.  Found that most of them are duplicates, but in different folders.  I would like to "merge" all the duplicates.  Any clues on how to do this?