Networks describe connected things. A Liquid Network describes a network where those connections can be maintained yet adapted. It describes a network that has a perfect harmony between the static and dynamic.
Solid networks don’t change. These are environments where you stay connected to the same information, knowledge, skills, people, and ideas. It’s great for maintaining order, but not very good for creating originality.
Gaseous networks do the opposite. New ideas can emerge all the time because new interactions/connections are happening with maximum frequency. But the chaotic nature of that environment means most connections are destroyed and short-lived.
Liquid networks do both things well: they allow new connections, and there is enough order that fragile ideas can be nurtured.
This is all pretty abstract, but it helps to illustrate the type of environment you’re seeking to achieve if you hope to promote innovation or new ideas. Think of the environments in which you play. You can probably diagnose how gasy (gaseous?), liquid, or solid it is. Don’t let your networks get too solid or too gaseous. (Insert lame joke here.)