A Swimlane is a means of grouping and categorizing the issues together on work board. For a Kanban team, prioritization and grouping of backlog issues is very important. The team needs to know which issues are of higher priority, the clear distinction between regular support tickets and improvements, and so on, to ensure that work on the backlog item is much more streamlined and smooth.
To access existing Swimlanes for your board, go to the Tools action, click on Configure and select the Swimlanes tab.
Some examples of typical Swimlanes for Kanban team based on current project settings and JQL are as displayed in following screenshot:
For example, suppose you want to Expedite all blocker issues, but you also want to separate out the new feature requirements from regular bugs and improvements...