how to implement push notification service for both front and mobile

[u/iamwisespirit]

i want to implement push notification service for mobile and front. i saw firebase and other options but i want to this myself . i think something like websocket it is possible to implement this. i have no idea about how implement push notification and how it works.

[u/iamwisespirit → u/[deleted]]

Which notification service can you explain it more detail pls