Positive student loan accounts will increase your score if they’re in good standing. By simply having them on your credit report, they count as an installment loan which adds to your credit mix (10% of your score). And by making payments on time, they help your payment history, the largest part of your credit score (35% of your score).
Like any account on your credit, ensure you pay it on time. If you fall behind on payments, or stop paying your student loans all together, it will become a derogatory account that will drop your score up to 100 points for seven (7) years. That could mean no credit cards, car, or even certain jobs, for a long time.
If your student loan is already delinquent or derogatory, work with a professional to remove the accounts for you.