Information

Check to suppress information messages. Information messages are
issued when the code is expected to compile and execute correctly
but another potential problem exists; for example, optimization
may have failed due to lack of memory.

Obsolete

Check to suppress messages about obsolete constructs. Obsolete warnings
inform you when you use any obsolete functions or syntax in your script.
Obsolete functions, although they still compile and run, have been replaced
by more efficient functions and will be discontinued in the future.
You should replace all references to obsolete functions as soon
as possible.