The critical paths shows the different attack steps an attacker (red node to the left) is expected to use to reach the high value asset (blue node to the right).
The first path we see is the most likely attack path. Every node is an attack step and the arrows in between them shows in what order they are reached. Multiple paths to the same node indicate that the attacker has to reach multiple attack steps to be able to succeed with the next one or that there are multiple equal paths available.
In the top toolbar, there is an option to increase the Detail level to show additional alternate paths. These additional paths are other possible paths that the attacker succeeds with but requires more effort and are therefore less likely.
Updated 6 months ago