What is the best almond flour to use for cooking/baking?

What is the best almond flour to use for cooking/baking?
Let's demystify almond flour.  When purchasing almond flour for baking, the following tips may help. Particle size - look for an almond flour that is finely milled, almost looks like a powder - this will yield the lightest baked goods - whether you are making your own macaroons, breads, muffins...