All purpose flour: Bleached vs unbleached.
All-purpose Bleached flour: Can be used for most “general” recipes. When in doubt this is the flour that will probably be your best pick, the most universal flour. Sometimes called “plain” flour.
All-purpose Unbleached flour: This is close to the same as the All-purpose Bleached flour. But before you just willy nilly pick bleached or unbleached here are a few things to consider. Unbleached flour is the closest to the natural process that flour takes to “bleach” itself. The “AP Flour” bleached version is more of a chemically treated flour but still close to the same product as the unbleached. Many bakers find that each flour has it’s own purpose, some claiming that unbleached is better for breads with yeast, and bleached being better for (example) cookies which do not normally call for yeast. Whichever you choose do some research to find out exactly what you are baking, your needs, and which flour suites your situation.
The thing to remember here is that if you are baking just for fun and you normally do cookies, get the unbleached. If you are looking for perfection, and are trying to bake the best dessert ever, do some research to determine which flour is best for your need…