Like everyone other scientific field, public outreach is a vital component of physics. Not only is it a way for scientists to communicate with non-scientists but it is also a way for students to learn about the latest and greatest in a sub-field.
I am regular contributor to the physics blog Quantum Diaries. You can also find me on my science Twitter account @bravelittlemuon (Look right!).
Usual Disclaimer: Thoughts are my own and not of my associated institutions.