Here are the steps on how to update Snapchat on your device:

On iOS:

1. Open the App Store app.
2. Tap on the Profile icon in the top-right corner.
3. Tap on Updates.
4. If there is an update available for Snapchat, it will be listed under Pending Updates.
5. Tap on Update to install the update.

On Android:

1. Open the Google Play Store app.
2. Tap on the Profile icon in the top-right corner.
3. Tap on Manage apps & devices.
4. Tap on Manage under Updates.
5. If there is an update available for Snapchat, it will be listed under Pending Updates.
6. Tap on Update to install the update.

Here are some additional tips for updating Snapchat:

• You can also update Snapchat manually by going to the App Store or Google Play Store and searching for “Snapchat”.
• If you are having trouble updating Snapchat, you can try restarting your device.
• You can also try clearing the cache and data for the Snapchat app. To do this, go to Settings > Apps > Snapchat > Storage > Clear Cache and Clear Data.