Well wonder no more!!
Chicken broth: Made more from the meaty parts. So when you toss in an entire bird along with your usual vegetables and spices, that's broth. I don't ever make this one because I just feel like using a full bird for broth and then throwing it out is a complete waste. Ina Garten has a recipe where she uses 3 roasting birds! That's 3 roasted chickens you just threw away Ina!! I love her but c'mon. I'm not rich.
Chicken Stock: This is when you mostly use bones. It's still chicken stock even if a little bit of the meat and skin are attached. This is my favorite of the 2 because you can make use of leftovers. And who doesn't want to make something new out of things you would throw out anyway? Chicken stock also has a lot richer flavor than chicken broth, due to the gelatin being released by the long hours simmering on the stove. Did I just gross you out? Get over it.
I have a recipe teaching you how to make chicken stock here. There's no ONE way to make it. You can throw in whatever veggies you want, whatever herbs and spices you want but this is a really good, basic recipe.