Blocking Mode works this way – if you feel like you would want to be a hermit and retreat into your shell, and would not want any reminders that someone out there happens to want to get in touch with you, then such notifications are able to be blocked.
Heck, you also now have the power to turn off notifications on the watch so that you will not be awakened unnecessarily in the middle of the night. A changelist on the entire slew of improvements and modifications have yet to be made available, although it is said that the general stability of the smartwatch has been improved as well. Aren’t you glad that Samsung looks out for their wearable tech as well as their collection of smartphones?