2) Create a System/Project/Issue notification. Add the Slack channel name, it can be a new or existing name. Add the channel topic as shown below.
3) Setup any filters (optional step) You can filter the type of notifications you see in your slack channel by any basic filters or setup the advanced filters using JQL. By default, no filter is applied.
4) Specify the events you want to be notified about (optional step). You can choose the types of events that you want to see in your Slack channel by selecting the options in the events tab. By default, all events are selected.