How can I use Exception groups in MD07?

Sorry for asking precise basal level questio but I can't find immoderate notation for this MD07 - Exception Groups

* What is Exception Groups for?

* How tin I usage Exception Groups? (Green colored portion successful attached image)

* What's meaning of column? How tin I usage it? (Purple colored portion successful attached image)

* What's meaning of these items? Can anyone explicate conscionable fewer item? (Red colored portion successful attached image)