You can't change the notifications in Cloud, it's a restricted function because you need to make changes to code files in the installation.
Telling us a site is hard to use isn't constructive - could you explain what you are struggling with? I find most of Atlassian's sites very easy to use, with the only caveat that there is so much information, it's sometimes hard to see exactly which page you need.
...be more productive while being fun to use at the same time. For some, getting started can be a bit intimidating. This is especially true if Jira Service Desk is your first exposure to Atlassian...
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