I recommend you first do what Mr. Hanky and jovery suggest and refrain from executing any 'tasks' of which you do not understand the purpose.
Originally posted by dbbyleo
There are great threads out there that can you plenty of info to get started doing DBA tasks. Do a search for "Monitor" or "Monitoring" in the administration forum and you get links to docs about tasks such as those you have posted. Good luck.
"The person who says it cannot be done should not interrupt the person doing it." --Chinese Proverb