Can any body discuss about review extensions in Google Adwords? and can we have our own review extension from third party site?

Submitting and managing a review is actually quite easy following the steps below:

1. Click the Ad Extensions tab in your AdWords account and select “Review Extensions.”
2. Click +Extension and then select the campaign to use with the extension.
3. Describe if the quote is paraphrased or exact.
4. Type in the quote, the source of the quote, and the source URL.
5. Hit “save” and you’re done.