What is Points vs miles vs cash back?
Points, miles, and cash back are the three forms credit card rewards come in. Cash back pays you a dollar amount you can take as a statement credit, direct deposit, or check, so 2% back means $2 for every $100 you spend, full stop. Points and miles are a rewards currency you earn inside an issuer's program (Chase Ultimate Rewards, American Express Membership Rewards, Capital One Miles) and redeem later, usually for travel. On most bank cards "points" and "miles" are the same thing under different marketing names; "miles" means actual airline miles only when the card is co-branded with a specific airline. One point or mile has no fixed value, so the same 10,000 points might be worth $100 cashed out or $150 booked through a travel portal, while a dollar of cash back is always a dollar.
How it works
Compare the sign-up bonuses on three real cards. The Wells Fargo Active Cash pays a flat $200 cash bonus, and its 2% back on everything means $2 per $100 spent, no math and no planning. The Capital One Venture Rewards gives 75,000 miles, which Capital One values at $750 toward travel (1 cent per mile), and you earn 2 miles per $1 on all spending. The Chase Sapphire Preferred gives 100,000 Ultimate Rewards points; cashed out at 1 cent each that is $1,000, but the same points are worth $1,250 booked through Chase Travel (1.25 cents each), and transferred to an airline or hotel partner they can be worth more still. The mechanic is identical across all three. Cash back's value is locked at a dollar, while points and miles move with how you redeem them.
Why it matters when picking a card
Match the reward type to how you will actually use it. If you want predictable value and zero effort, flat cash back wins. The Citi Double Cash and Wells Fargo Active Cash both pay 2% with no annual fee, and you never have to think about redemption. Points and miles have a higher ceiling if you book travel and take time to redeem well, but that ceiling only pays off when you use them. Left sitting unredeemed, or cashed out at 1 cent each, they often net the same as (or less than) a 2% card once you subtract the fee. The Sapphire Preferred and Venture Rewards each charge $95 a year, so you need to pull real value out of the points to come out ahead. Rule of thumb: cash back for simplicity, points and miles if you will travel and optimize.