I keep seeing people bake their cakes with a flower nail.. what do they mean? what does the flower nail do? I tried searching but everytime I search for somthing, everything comes up but what I'm looking for (my sister makes fun of me becuase I'm the only person that can't work google lol)

Bake it inverted in the center of your large cakes to conduct heat to the center and make baking more uniform. I use them for anything 10" and larger. Be sure to spray it first with cooking spray.

Jamm is right. It conducts heat and it should be used with 10" + cakes. Here's what I do, step-by-step:
Prep your cake pan with the parchment circle and cake release. I then brush the nail completely with the cake release and lay it in the middle, inverted, so that the nail part is sticking straight up. Pour your cake batter over the nail and bake as usual. Very easy. Let the cake cool for about 10-15 min. in the pan, invert to remove cake from pan and remove the nail. HTH

I use 1 or 2 nails in all my pans larger than 8 inches. It helps cook the center of the cake so that it is all done at the same time, instead of waiting until the center is done but risking the edges getting dried out and overcooked.

oh cool thanks I have a big cake this weekend so I will give it a try

Just a couple more things I've learned from others here on CC:

When you flip the cake out onto a cooling rack, make sure that the nail will land in one of the holes in the rack. If it hits the rack itself, your cake will split.

Instead of using this site's search engine, go to google and type in "Cake Central + _________" Put whatever it is you're looking for in the blank. It works every time!

I tried this flower nail thing once and I still think it's just a bunch of silliness. Turn your oven temp down.