To join a multiplayer game, open the PlayStation App, navigate to the 'Friends' section, and select a friend who is currently playing. Tap on their activity, then select 'Join Game' to enter.

Yes, you can manage downloads. Go to 'Library', find the game you wish to manage, then select 'Download' or 'Cancel' if a download is in progress. You can also prioritize downloads from this menu.

To set up notifications, open the app, tap on your profile icon, then go to 'Settings'. From there, select 'Notifications' and customize what activities you want to be notified about, like game updates or friend activities.

Sharing gaming activity is easy. Open the app, tap on 'Profile', then select 'Share Activity'. You can choose what you want to share, such as trophies earned or game progress. Adjust settings for privacy as needed.

To redeem a game voucher, follow these steps: 1. Open the PlayStation App. 2. Tap on your profile icon in the top right corner. 3. Select 'Account Settings'. 4. Choose 'Redeem Codes'. 5. Enter the voucher code and confirm. This will add the game to your library.