Google’s Android 17 update is rolling out to Pixel phones as we speak, bringing a few handy new features, including multi-tasking bubbles, expanded dark theme controls, and a redesigned screen recording UI. But while user-facing upgrades steal the limelight, Google’s developers have been quietly working away to improve the core Android OS too.At the heart of these subtler tweaks are four key changes in Android 17: app memory limits, local network permissions, dynamic code loading restrictions, and Certificate Transparency by default. Here’s what they all mean for your smartphone’s latest and greatest OS upgrade.