Since you're asking how to update the Play Store app, I'm assuming you're referring to the Google Play Store app on your Android device.
There are a few different ways to update the Play Store app:
-You can update the app through the Play Store app itself. Just open up the Play Store app, tap on the hamburger menu in the top left corner, and tap on "My apps & games." From there, you'll see a list of apps that need to be updated. Tap on the "Update" button next to the Google Play Store listing.
-Another way to update the Play Store app is to download and install the latest version of the app from APKMirror.com. Just head to the APKMirror website, find the latest version of the Play Store app, and download the APK file. Once the file is downloaded, just tap on it to launch the installation process.
-Finally, you can also update the Play Store app by sideloading the latest version from a PC. Just connect your Android device to your computer, Navigate to the platform-tools folder, and open a Command Prompt or Terminal window. Then, type in the following command: "adb install -r <filename>" (without the quotation marks). Replace "<filename>" with the name of the APK file you downloaded. Once the installation is finished, you'll have the latest version of the Play Store app on your device.