What is sequential R square in variable selection node in the output of "effects in the model"

[ycenycute]

I successfully run the variable selection node, and got the figure below in the results. I am wondering what does sequential R square mean in the vertical axis here?

[JosvanderVelden · Accepted solution]

Effects in the Model — a histogram ranking variable effects by their sequential R-Square scores.

For some more information please read: https://support.sas.com/resources/papers/proceedings20/4701-2020.pdf