Credit utilization is the percentage of your available revolving credit that you are using.
Simple example
If your card has a $10,000 limit and the reported balance is $2,000, your utilization on that card is 20 percent.
Why people care
Utilization affects credit scores because high reported balances can signal repayment strain, even if you pay on time.
Practical takeaway
You do not need to obsess over tiny fluctuations, but very high utilization can make your profile look riskier than it really is.
Bottom line
Lower utilization usually helps your credit profile look healthier, especially when you are preparing for a loan or new card application.