After you have identified critical nets or groups of nets, you can add global bias constraints to manage and plan the routing path.
There are various aspects of biasing and you can view the actual results by running global routing and ECO congestion analysis.
Related Topics
How do I create a global bias positive region constraint?
How do I create a global bias negative region constraint?
How do I create a global bias path constraint?
How do I create multiple global bias constraints for specific layers?
How do I add and remove nets in the Global Bias Setup form?
How do I correct a region created in error?
Can I rename default global bias constraint name to a user-defined name?