Most of the credit cards out there give you bonus points or airline miles for things like buying groceries, filling up on gas, or making travel arrangements. And there are a lot of great credit cards available if those are your main spending categories. But what if you do a lot of shopping on Amazon, and you want to maximize your rewards? Then which card should you be using?

Let's take a look at some options.

Amazon Prime Store Card

The official Amazon credit card is provided by Synchrony, an online bank. It'll also get you the most cash back on your Amazon purchases out of any credit card available, which is pretty impressive. Here are the basics:

• $40 Amazon gift card sign-up bonus (at the time of this writing).
• 5% cash back on purchases at Amazon.com.
• No annual fee (except the cost of Amazon Prime).
• 26.25% APR (annual percentage rate).
• Access to 6-, 12-, and 24-month financing.
• Available only to Prime members.

Note that there is an Amazon (non-Prime) Store Card, but with no cash back, there's no point to getting it. And because this is a store card, you won't be able to use it anywhere else -- it only works at Amazon.

With those caveats, this card is actually a pretty good deal. 5% cash back is what you'll get from the best cash back cards, but usually only on specific categories of purchases, like groceries, gas, or home improvement, while other categories will get you 2--3%. Those extra couple percentage points could add up over time if you do a lot of shopping on Amazon.

You can also choose one of their financing offers instead of taking the 5% cash back -- but don't do it. Only use your card if you can afford what you're buying, and you'll be in much better financial shape. And you'll get the 5% cash back that makes the card worth having in the first place.

Chase Amazon.com Rewards Visa

If you'd rather have a card that will work anywhere, you can check out the Chase Amazon.com Rewards Visa. The rewards scheme is a little different:

• $50 Amazon gift card sign-up bonus (at the time of this writing).
• 3% cash back on purchases at Amazon.com.
• 2% cash back on purchases at gas stations, drugstores, office supply stores, and restaurants.
• 1% cash back on all other purchases.
• No annual fee.
• Up to 22.49% APR.

As you can see, the cash back from the Chase's Amazon credit card is less than that of the Store Card... but it can also be used (and earn you cash back) on purchases outside of Amazon. Let's say you spent $2,500 this month, with $350 of it on Amazon, just for the sake of comparison. Obviously this might not even be close to what you consider realistic, but we'll go with it.

With the Store Card, you'd be getting $17.50 in cash back. The Rewards Visa would give you $10.50 in cash back from Amazon, plus at least $21.50 back from everything else, giving you at least $31.50 in total cash back. And it you shopped at gas stations, drugstores, office supply stores, or restaurants, you'd have even more.

Going with the Chase Amazon card seems like a no-brainer... but remember that because the Synchrony option is only a store card, you'd be more likely to get it without a good credit score, while you might need a better score to get the Chase card.

Other Cash Back Credit Cards

Of course, there are plenty of other options for getting cash back on your credit card purchases. To decide whether they're going to be a better deal for you than the above two Amazon-specific credit cards, you'll need to look at your spending habits to see how much you spend on Amazon and how much you spend in other categories.

So if you're not tracking your spending, you should definitely get on that.

Here are a few top-notch cash back credit cards that will be good for many shoppers.

Chase Freedom Visa

This is one of Nerdwallet's favorite cash back cards and for good reason: it has solid rotating bonus categories, gives you 1% cash back on everything else, and has an easy-to-achieve sign-up bonus. Here's the low-down:

• 5% cash back on bonus categories that rotate every three months.
• 1% cash back on everything else.
• $150 sign-up bonus when you spend $500 in the first three months.
• No annual fee.
• Up to 23.24% APR.

The rotating categories include things like gas, groceries, department stores, and wholesale stores -- places where you almost certainly spend money anyway.

The fact that this card has no annual fee is one of the things that sets it apart from many other cash back cards, and getting a $150 sign-up bonus can be a nice boost to your savings (or, if you prefer, a little bonus).

U.S. Bank Cash+

Unlike many cash back credit cards, this offering from U.S. Bank allows you to choose the categories that you earn more cash back on, which -- if you use it well -- could end up earning you a lot of cash back. Here are the basics:

• 5% cash back in two categories of your choosing (each quarter).
• 2% cash back on groceries, gas, or dining (your choice).
• 1% cash back on everything else.
• No annual fee.
• Up to 23.24% APR.

Each quarter, you'll choose two categories to get 5% cash back on; they can be things like bookstores, fast food, charity, department stores, and select clothing stores. These categories may change quarterly, but there will always be at least a couple that you tend to spend on. You also get to choose whether you'll get 2% back on groceries, gas, or dining each quarter (but only one).

Remember that if you choose this card, you'll need to choose your categories, or else you'll just get 1% on everything. Fortunately, U.S. Bank will send you quarterly reminders to make those choices.

Discover It Card

The Discover It card has a lot of nice features, like FICO credit score monitoring and U.S.-based customer service. It also has some great cash back deals. Here's what you need to know:

• 5% cash back on rotating quarterly categories.
• 1% cash back on all other purchases.
• No annual fee.
• Up to 23.24% APR.

The great thing about the Discover It card if you're a big Amazon shopper is that Amazon.com is one of the rotating quarterly categories! In 2016, Amazon is listed as one of the 5% categories from July through December, meaning it covers both back-to-school time and holiday shopping. The other quarterly categories include things like department stores, restaurants, and gas.

The quarterly categories don't include quite as many useful entries as some other cards -- groceries are conspicuously absent, for example -- but the fact that it includes Amazon and lets you get 5% on up to $1,500 in purchases makes it a solid choice.

Which Cards Do You Use to Shop on Amazon?

These five credit cards are great choices if you do a lot of shopping on Amazon. Of all the choices, if you want to get the best deal overall, the Chase Amazon.com Rewards Visa is the way to go. It doesn't get 5% back on any categories, but the constant Amazon bonus as well as the 2% on other categories make it an extremely attractive option for Amazonphiles.

And, of course, if you have good credit, you could consider opening multiple cards -- an Amazon store card for getting 5% cash back on Amazon purchases, and a Chase Freedom Visa to get 5% on rotating bonus categories, for example. If you have good credit, use it to your advantage to maximize your savings! (You may also be able to combine rewards points on cards from the same providers, further increasing your savings.)

Because there are hundreds -- if not thousands -- of other cards out there, though, we want to hear from you on which cards you've found to be good for shopping on Amazon!

Which credit cards do you use when shopping on Amazon? Do you use specific cards for shopping there, or do you have a single general-use card? Share your thoughts and tips in the comments below!