There are multiple types of credit cards. Generally you can trade higher rates for higher credit limits, a longer float before interest starts, a low intro rate 18mo at 0% is common, cash back, or other rewards.

If you really pay off every months you want a 45 day carry before interest and cash back. But, they often have much higher rates.

PS: I have two one at 9% another at 12%, but the 12 has a much higher limit.