So, I will only here comment on the notion of the 'digital swarm' that is the core idea of the book.
This 'swarm' has, according to Han, characteristics that do not correspond to the popular image of what social media leads to or can do. One is that it leads to a "gathering without assembly--a crowd without interiority". Sometimes these individuals come together in gatherings, for instance in "smart mobs". Han continues, these individuals "collective patterns of movement are like swarms that animals form, fleeting and unstable. Their hallmark is volatility." (p 12).
To me, this type of language makes sense in relation to phenomena we experience on social media. Large swarms of people 'liking' and supporting a protest during a fleeting moment in time, just to move on, to the next 'issue' or 'cause', without creating or constituting a sustainable structure or foundation that can engage with real issues, in real time.
Of course, we all know examples where social media truly makes a difference and have influence our society. however, Han's reflections are, in my view highly interesting and raise a lot of questions. I am eager to read more in this book, even though it has already been valuable enough to me.