1. Open Settings on your Windows PC in the Start Menu. You can use the Windows key + I keyboard shortcut to open Settings. Go to System.

2. Click on Notifications & actions. First, enable the toggle next to Get notifications from apps and other senders.

3. Scroll down, and you will see the list of apps. Click on Chrome (if you're using Chrome) or Edge (if you're using Edge).

4. You will find Show notification banners and Show notifications in action center settings for each app. Make sure they are turned on.

4. For notifications to work properly, the concerned app should be allowed to run in the background. To verify that, go to Settings > Privacy > Background apps. Enable the toggle next to Let apps run in the background. If it’s on, disable it and turn it on again.

After enabling it, scroll down on the same screen, and you will have the list of apps. Check if Google/Edge are allowed to run in the background. Enable the toggle next to the app to turn it on.

5. Focus Assist is a feature in Windows 10 that turns off notifications on your computer. If enabled, you will not receive notifications. So make sure it is disabled. To check that, go to Settings > System > Focus Assist. Select the box next to Off. Also, check the settings under Automatic rules. Make sure Focus Assist isn’t set to activate automatically.

6. Another Windows setting that could be responsible for no notification banners is Battery saver mode. When activated, it limits background activity and notifications.

To disable it, go to Settings > System > Battery. Turn off the toggle next to the Battery saver. Also, check the percentage under Turn battery saver on automatically. It should be kept very low. Otherwise, you will miss notifications if kept at a high battery percentage.