For most airmiles card users, users can choose to accumulate points to claim a big-ticket item of a higher value. Rewards miles can usually be redeemed with travel site partners. However, it’s good to note the terms of redemption as there may be travel restrictions like blackout dates, or changing mileage conversion rates between the time you earned the points and the time you spend the points.
Cashback rewards are usually credited back to your credit card as rebates on a monthly basis. Most credit cards do not require to do anything extra after making your purchases. As long as you fulfil the requirements to meet the cashback rewards, it will be automatically credited to your account.