If you are using geotargeting, how do you see what ads appear on a keyword search, for example, in Australia, when you are not in Australia?
You can use the ad diagnostics tool within adwords or you can use this firefox extension: http://www.redflymarketing.com/blog/google-global-firefox-extension/
Maybe find an australian proxy server that you can then jump to google from there and test your search keywords that way.
Add &gl=au to the end of the URL. For example type in the word widget on google.com. You'll get something like this: http://www.google.com/search?q=widget&rls=com.google:en-US:official then add http://www.google.com/search?q=widget&rls=com.google:en-US:official&&gl=au
Success, are you talking about checking what ads appear on a site (content network)? If so, the easiest method and the one approved by Google, is to use the Adsense Preview tool: https://www.google.co.uk/adsense/support/bin/answer.py?answer=10005 I would point out that the Firefox version of this tool is a third party creation and not approved for use by Google. If you're not asking this question, can you clarify what you want to do? Jon
use a proxy (sometimes is hard to find the right country proxy) or the ad diagnostics tool within adwords by changing the country code.
All of the answers here are ok, but they are slightly an exercise in making life more complicated than it needs to be. Click this link https://adwords.google.com/select/AdTargetingPreviewTool That's it. Job done.