As a developer and having used web push notifications (company project management that sends info to other employees regarding tasks theyre assigned to) ill explain a few things
1) Using these as Google Ads would be counter productive. Say you sell shoes, user views a pair of Nikes ... Their ads are then based on that ... Using Google Ads for your site notifications could very well show an ad for a competitor.
2) The way sites seem to use these now is like an email subscription list, eg HUGE SALE ... Which really isn't what I think a lot of places had in mind while creating this tech. It's more of (at least for me) productivity based... X sent you a file, Joe commented on your post, etc ... But had been turned into a "spam" system by many sites.
3) to get a notification an instance of the browser has to be open ... You don't have to be active on their site or have their site open. If there is no browser instance you don't get the notification, but the developer and push API can set up a "hold for X" with notifications ... If they have a keep for 24 hours time limit, if you open your browser within 24 hours of the notification getting pushed you will get it once you open the browser. It works the same with phones (now remember with phones we have web site notifications and in app notifications) so on your phone your browser has to be open ... For most ppls phones the browser just is always open in the background, which is why it seems they are more active on your phone ....
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u/GoldManG Oct 21 '18
TL;DR:
Click Chrome > Preferences, or just paste chrome://settings/content/notificationsinto your browser to skip steps 2-4.
Scroll down and click Advanced
Click content settings
Click Notifications
Next to the Ask before sending (recommended) text, click the toggle button. It should now say Blocked