What is the "Push and Pull" module in Bitrix?

Question

1C-Bitrix

Settings -> Product settings -> Module settings -> Push and

Pull
If you configure the module, is it possible to somehow send notifications to subscribers with custom content (for example, "There is a promotion in our store!") from the browser, or only when the subscriber is on the site? Or is it possible, but only from Bitrix24?
Or is this module used by other modules and automatic notifications? (I saw a video where, after setting up, notifications about the created order began to come).

Answer 1

The push'n'pull module is responsible for "instantaneous" delivery of "messages" to a subscribed/active client.
"Instantaneous" depends on how exactly it is configured, in what environment the site / portal works, and what load on the server.
A "message" is any forwarded unicode set that the client itself handles (i.e. for a mobile application, and each page of the site can have its own handler).
How to work with the module is in the developer's article:
https://dev.1c-bitrix.ru/community/blogs/hazz/work...
In addition, the documentation is:
https://dev.1c-bitrix.ru/ api_help/push_pull/index.php

who subscribed, with custom content (for example, "There is a promotion in our store!") from the browser

It all depends on what you mean by "send". If you mean, bring the user to an open page - yes.
To send to the browser directly, you need to write "Service worker".
To send push notifications to a mobile application, you need to write a mobile application.