What it means
Narayana's name, repeated. That's all.
Where it comes from
In the Puranas, and in every TV retelling since, Narada arrives saying Narayan Narayan. That's made the phrase familiar to almost everyone. The idea underneath is lovely, though: every errand and every journey Narada makes happens with this name on his lips. For him it isn't a practice set apart. It's more like breathing.
How to chant it
No method at all. Walking, working, waiting: keep it going quietly in your mind.
When: Any time at all.
Try it now
The japa counter opens with this mantra selected and keeps count for you.
Questions people ask
The Puranas call him Narayana's greatest devotee. Taking the name isn't a rule he follows. It's simply who he is.