How vital is the Nord Stream 2 pipeline to the Russian economy?

From the BBC World Service: The European Union’s foreign affairs chief Josep Borrell says Nord Stream 2 could be included in sanctions against Russia if it invades Ukraine. Plus, China introduces new rules for larger technology companies seeking to list their stock overseas. And, the number of robots being used in workplaces has jumped since the start of the pandemic, including in small and medium-sized companies.