You will also notice a js folder with an app.js file; this is where you can put all your custom JavaScript for the project. If you open this file, you will notice that it is just calling Foundation.
You will also notice that there is a node_modules folder and it has a bunch of additional folders. These are just Node modules that are needed for Sass and Grunt; you should not worry about having to touch anything in there.
You will also notice a few other files in the root of the project directory, which are as follows:
.bowerrc: This tells the project the directory to the Bower components..gitignore: If you are using Git, this is where you tell Git not to commit the files and folders that are listed in this file.bower.json: This will specify dependencies. You will never change this file.humans.txt: You can write project notes or anything else that is relevant to the project to let other people working on the project...