It's become common for companies such as Google to do targeted software releases, limiting access through region, platform or device. For Google Search Lite, a snappier and slimmer version of the current Search app, is currently restricted to just a few locations... and none of them are Australia. Fortunately, you can manually install the APK if you want to give it a try.
As Android Police's Rita El Khoury explains, Search Lite is just one of a number of "lite" apps, designed not only be smaller in size, but use less data.
Although there are countries out there that have it worse than Australia when it comes to mobile download limits, such an app would still be very useful for those on stingy local plans.
If you want to try it out, you'll need to download and install the APK, as the app isn't available on Australia's Google Play store. English also isn't a language option, though according to Android Police, picking the first choice, "Bahasa Indonesia", will do the trick.
Admittedly, it's a bit of trouble to install and certainly not a necessity, but it could save you some megabytes if you're a heavy search user.
Google is testing a new Search Lite app for slow networks [Android Police]