If you pay a charge-off in full, your credit report will be updated to show the account balance is $0 and the account is paid. The charge-off status will continue to be reported for seven years from the date of charge off. Another option is to settle charge-offs for less than the original balance if the creditor agrees to accept a settlement and cancel the rest of the debt.
Credit scoring models usually take into account how much you owe compared to how much credit you have available, called your credit utilization rate or your balance-to-limit ratio. Basically it's the sum of all of your revolving debt (such as your credit card balances) divided by the total credit that is available to you (or the total of all your credit limits).