I have created key frames animations using maya for my model created in maya exported to unity.
The animation layers hold my animations. I do not seem to understand how exactly to export animations
Before any animation can be used in Unity, it must first be imported into your project. Unity can import native Maya (.mb or .ma), and also generic FBX files which can be exported from most animation packages .
To import an animation, simply drag the file to the Assets folder of your project. When you select the file in the Project View you can edit the Import Settings in the inspector window:
In the Import settings click on Animations tab and check/enable the import animations tick mark.
Check out the below links to bring your animations from maya to unity: