W’ is not an easy metric. You should not give it to much thought. What you can say is that people with high W’ have a bigger anaerobic capacity, think sprinters and guys that race up short steep hills.
The W’ concept has a lot of flaws. First of all, there are 2 different calculation methods, differential and integral. The results are quite different. And then there’s the ‘recovery’ phase for W’ which is based on an avg constant but can in practice be quite different among different athletes.
These things have been covered already on the forum.
And an interesting chart that is available as a custom chart is the Veloclinic plot.