What does these HD SMART attributes mean?

Hi
i did a Hard disk analysis and found some of the following properties with it.
Power Cycles = 1112
Start Stop Count = 1341
Power Off Retract Count = 1463
Power On hours(obvious) = 4525

could someone tell me what those above figures really means?
 
To make this easy for you to understand download the program called HD Tune. Remember to get the free version unless you want to buy the pro. The program shows you how many hours or how well the HD is doing 100% means your okay if the number is lower then the HDD is starting to degrade. Check the health of the HDD it will say okay means don't worry, If not then worry and replace the HDD.
 
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