Curious to know what Google has in store for its Maps app? Now you can be among the first to play with new features.

Google's new beta testing program for Maps on Android will let users play with an unreleased version of the app. But, as with any piece of beta software, just don't expect the testing version to be perfect. "Testing versions may be unstable or have a few bugs," Google warned.

The Web giant is, of course, seeking feedback about the app. Testers can follow the steps on this page to share their thoughts with Google. Be sure to make your reports as specific as possible; if you're not sure what something is called, describe it, and include as much information as you can. If the app crashes, for instance, tell Google what you were doing, what happened, and what you expected.

The new beta version comes after Google last week updated the stable version of Maps to let you search along your route when you're in biking or walking navigation mode.

Meanwhile on the Maps front, there's one feature headed to the service you may not be too thrilled about: ads. Google last week said it's "experimenting with a variety of ad formats on Maps that make it easier for users to find businesses as they navigate the world around them." Search ads will appear on the desktop and mobile versions of Maps. When searching for a coffee shop or pharmacy nearby, for instance, the results might show an ad-supported result first, designated by a purple "Ad" badge.