When we talk about credit scores, there are typically two significant players, FICO and VantageScore. Each uses similar factors to determine your credit score within their system.
Many factors can impact your credit score. Some more than others, but each aspect is just a piece of the puzzle when lenders look at the risk level associated with lending you their money.
The amount of debt you are carrying will also affect your score. There is more to it than the amount of debt, but the easiest way to think about it is the less debt you have, the better.