Yes, this is a legitimate system-level component. It is not a standalone app you would "open," but rather a background service that other apps call upon. Common Issues
Many developers or carriers use the "au" prefix for Australian-market versions of software. au.android.webview-android
Android System WebView is a core system component that allows Android apps to display web content without opening a separate browser. It essentially acts as an embedded browser engine (based on Chrome) inside other apps. Why it might be on your device Yes, this is a legitimate system-level component
Most issues are resolved by visiting the Google Play Store and ensuring the "Android System WebView" is fully updated. au.android.webview-android