Debt avalanche is a debt repayment strategy where you pay off your balances with the highest interest rates first. Debt snowball allows you to focus on smaller debts to get them out of the way, so you can focus on larger ones.
From a financial standpoint, the debt avalanche technique is always going to cost you less than the debt snowball. Keep in mind though that it can take a lot of discipline to keep up with.
If you find it difficult to stay focused on long-term goals, and especially if you’ve had a hard time paying down large balances in the past, debt snowball can be a great debt repayment option to go with.