The Message Area consolidates all errors, warnings, and other information into one place. Double-clicking an item in the error list will bring you to the relevant location in a script. The message area can be moved by dragging its title bar.
Warnings are divided into three categories: Errors, Warnings, and Info. Info hints that there may be a problem. Warnings are items which are incorrect but may not prevent a script from executing. Errors are items which are definitely incorrect.