UCC21750: What is "CL" meant to represent?

Tool/software:

There is a spec in the electrical characteristics table called CL, the datasheet defaults it to 100pF

Then further down in the table on page 7, the gate driver stage, the conditions change to 180nF for CL

I don't see CL called out in any of the example circuit diagrams in the datasheet. 

What is CL meant to represent?

Thanks, Nick