The Google Ideas button allows you to get keyword ideas based on Google's search term suggestions.
How it works:
1. Clicking on the G Ideas button will open the Google Ideas window:
2. You can Load keywords that are already in your AdWords account by clicking on the Load link.
You can type in a few key terms.
3. Make sure to fill in the Location you are targeting, and the Language of the users you are targeting, then click the "Get Google ideas" button.
4. As can be seen in the example below, the results are Google provided keyword search terms ideas along with the search volume in the location you selected.