The Maya Help (what you're looking at) provides searchable documentation on all the features in Maya, from beginner to advanced techniques. It also contains technical documentation with information about scripting, and developer help with detailed information about the Maya API.
There are two versions of the Maya Help: the online default version, accessed on the Internet, and an offline version that you can download and install locally. Both versions appear in your web browser and give you complete access to the Maya documentation. See Using Maya Help for more information.
If you're new to Maya or are transitioning from another 3D software application, the "Exploring Maya" video series provides a starting point for understanding many Maya features. Choose http://www.autodesk.com/maya-tutorials to access the videos.
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