To be approved for A Walmart Credit Card you need to have a credit score of at least 600 but the higher your credit score the better.
If your credit score is below 600 then it may be hard for you to get approved for the Walmart Credit Card.
If you're unable to get approved for the Walmart Credit Card due to a low credit score you may need to get a secured credit card through Capital One or some other Credit Card company.
With the secured credit card you put up a deposit which is used as your credit limit and then use the credit card just like you would use any other credit card.
You then get a credit card bill either online or in the mail and you pay back the credit card when you use it and if you make the payments to the credit card on time it will help improve your credit score overtime.
Then once you have a better credit score you can get the Walmart Credit Card or any other Credit Card.