How to read it
Bubble size is library popularity. Lines are dependency co-presence, and indicate pairs of libraries that are unusually likely to appear together.
Switch to "direct only" to see only explicitly declared dependencies, filtering out transitive ones pulled in by the Maven resolver. This reveals which libraries developers actively chose rather than inherited.
Drag a bubble to move it. With pin enabled it stays where you drop it. Double-click a bubble to unpin it.