To update Snapchat, you'll need to head to the Google Play Store, where you can find the latest version of the app. Make sure you're connected to a stable internet connection, and then search for Snapchat in the store. If an update is available, you'll see an "Update" button - just tap it to start the process.
The update process usually takes a few minutes, depending on your internet speed and device performance. Once the update is complete, you'll be prompted to restart the app or continue using it as usual. Either way, you'll be enjoying the latest Snapchat features in no time!