YouTube Vanced is a modified version of the official YouTube app for Android devices. It offers several additional features and customization options that are not available in the original YouTube app.

One of the primary features of YouTube Vanced is the ability to play videos in the background or with the screen turned off, which is not supported in the official YouTube app without a YouTube Premium subscription. This allows users to listen to audio from videos while using other apps or when the screen is off.

YouTube Vanced also includes an ad-blocking feature, so you can watch videos without interruptions from advertisements. Additionally, it offers various themes, such as a dark mode, and allows users to override the maximum resolution and playback speed restrictions.

It's important to note that YouTube Vanced is not an official app developed by Google or YouTube. It is a third-party application developed by independent developers. As a result, it may not be available on the Google Play Store, and you would need to download and install it from a trusted source.

Please keep in mind that while YouTube Vanced provides additional features and customization options, it may violate YouTube's terms of service. Consequently, using YouTube Vanced could potentially result in the suspension or termination of your YouTube account.