Read the die the flow's own heat maps
Every image is a map the flow drew at the end of a real run. Some of those runs were broken on purpose and some were not, so the question is what the picture says, not whether something must be wrong with it. Three kinds of question: name what you are looking at, say which of two is healthy, or click the region being asked about.
Every map
A mixed round across all three kinds of map, with no clue which is coming.
Congestion
Where the wires want to go, and whether there is room for them.
layer starvationhotspotsstructureVoltage drop
How far the supply sags, and how easily a colour scale misleads.
gradientgrid strengthreading the legendPlacement
Where the cells ended up, and what the empty space is telling you.
utilizationspreaddensityClock trees
The shape a tree takes, and what a knob does to it.
balancedepthbuffer spacingThe worst path
The one path the whole design is judged by, drawn on the die.
launchcapturedatadistanceRouting and repair
Where the wires went, on which layers, and which cells were changed to make it work.
layerspaletteresizing