Google is pushing out the new version of the Play Store. It is now rolling out to few devices, while major of the users are still waiting for it. You can download the Google Play Store v7.8.74 from the source link below via APKMirror.
There’s no changelog available for the v7.8.74 which launches today. Recently, Google have added many design changes to the Play Store App. They have refined the look with new UI elements.They have even added, Instant Apps support ot the latest build.
Right now it is not available for most of the users. So in order to download and install the new version of the update. You need to update your settings to allow your device to install the app. Head to the Settings » Security and enable the installation by ‘Unknown sources’ feature.
In order to download the latest update you can check it below.