What does revoloving accounts mean on your credit report?

Can these be closed ? Does having these lower your score? Are these open accounts that can be reopen/used again? What the best way to clean up your credit score?
The revolving accounts are paid but they still showing as revolving accounts, can one of these be open so that I can use it to help raise my score? Seems I can’t get a new credit card since they turn me down but my score is average so I am not sure what is keeping me from obtaining a new card, so if I contact one of them on my credit report can I get the card re-issued or go through the application process again and be turned down by the same bank on my credit report?

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