Data
Now we're getting into the heart of the GeoServer; the data.
In this area, you can configure the data access. Stores let GeoServer know where your data is and what it is. Layers are about how your data will be published. Jump in and look at the layer previews first. We'll be visiting the Layer Preview section many times as we brew up our own layers.
Layer Preview
Layer Preview includes every layer known to GeoServer. You'll find several sample layers already listed. From here you can open an OpenLayers sample application to have a look at what your data looks like. There are also several other preview formats; a popular one is the KML format.
Note
Keyhole Markup Language (KML) is used to display data in Google Earth.