there is no "space settings > Integrations > Slack Notifications"

[Ottoman Dervish]

The documentations mentions "Slack Notification" under "space settings > Integrations"

Confluence Cloud for Slack no option for space int... (atlassian.com)

my confluence (cloud) doesn't has such an option.

Also following URL says "page not found".

https://anatoliadevopscenter.atlassian.net/wiki/plugins/servlet/ac/confluence-chats-integration/addon-config-page

[Daniel Eads]

Hi @Ottoman Dervish ,

I just wanted to check in and see if this is cleared up for you now. Your Confluence site is reporting that it has the Slack app installed currently. If you still can't see it in the Manage apps list, please let me know and I'll get a support case opened to sort it out.

Thanks!
Daniel | Atlassian Support

[Nic Brough -Adaptavist-]

You probably don't have it enabled yet.  Go to Admin -> Manage Apps and select "system" in the select list, and look for Slack in there.

[Ottoman Dervish]

Thanks for your fast feedback @Nic Brough -Adaptavist- 

There is "Slack" in apps.