Google Docs vs. Word

How to tell I have Google Docs file or Word file format?

In the Google Docs,

• Indicates as a Word format.

• Indicates as a Google Docs format.
• How to convert Word format to Google Docs?
  • See "Upload a Word document and convert it to a Google document" http://support.google.com/drive/bin/answer.py?hl=en&answer=49008