What does Android App Bundle mean?
An Android App Bundle, commonly called AAB, is a publishing format that can let a distribution system generate optimised installable packages for different device configurations. It is not simply another name for a universal APK that every user can install directly.
Why it matters
The distinction matters when a download guide lists file formats. End users normally follow the publisher’s supported installation channel rather than renaming a bundle or using an unknown conversion website. Device architecture, resources and signing still matter. Fire OS publishing workflows and Vega workflows also use different platform formats, so the words Fire TV do not resolve compatibility alone.
A practical example
For example, receiving an AAB file does not justify changing its extension to .apk. Ask for the intended distribution route or compatible package instead of forcing an unsupported installation.
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Related terminology: Android APK, Android signing identity.
For practical setup and troubleshooting, browse the journal or support guides.