Viva Connections is part of Microsoft Viva, the so-called employee experience platform integrated into Microsoft 365 and Teams. It provides employees with personalised and centralised access to company communications, resources and tools. In an independent and smart way, Viva Connections tries to put together a customisable dashboard and send you notifications based on what you read and edit in Microsoft 365 (Office, Teams, Sharepoint, ...). 

You can disable Viva Connections notifications in Microsoft Teams by adjusting the notification settings:

1. Open Microsoft Teams: launch the desktop app.
2. Go to Settings: click the three dots next to your profile picture (top right) and select Settings from the menu.
3. Select Notifications: in the settings menu, click Notifications and activities.
4. Find Viva Connections: scroll to Apps and under it Viva Connections. You can disable Viva Connections altogether or customise specific notifications to your preference.

This will stop you from receiving unwanted notifications from Viva Connections.

You can also disable notifications by right-clicking the three dots on a notification in the activity view and choosing Disable Viva Connections from the menu.