Ideally speaking, it is all in your hands to improve your credit score as it requires a certain good financial behaviour. You will not have a credit score if you have not taken a loan or used a credit card so far. In case you have a bad credit score, you can always improve it by clearing the past negative issues or paying the bills and loans consistently.

An example would be the credit improvement service from CreditMantri which will help you to improve your credit score.