Learning in public means sharing what you learn as you learn it, rather than keeping it to yourself until (and only if) it grows into something big and important enough to publish. note.garden is designed for just this purpose.
Learning in public provides the opportunity for getting early feedback, leading to what Elizabeth Gilbert calls “compassionate alignment with reality” before you take a new idea too far in the wrong direction.
But it also requires a degree of vulnerability and willingness to be wrong, since not everything one learns is the whole story or even true. Though I find that learning in public keeps me honest, more likely to seek out sources and counter-arguments for what I think I know, and it helps that note.garden sometimes surfaces those as I write without my having to seek them out.
Shawn Wang has done a lot of thinking about learning in public and has some helpful advice on how to go about it.