Numeric and Trigger Models in Boom

In Doom Builder with the Boom engine, I went to Edit Linedef Selection: Select Action: Generalized Linedefs... and I saw "Model: Trigger", which could be changed to "Model: Numeric".

I understood the trigger model, but what the heck does numeric model do? And how does it apply to Doom's gameplay?

The numeric model uses the sector which is neighboring the sector to be changed on the lowest numbered two-sided linedef in this sector which does not have the same sector on the other side and has the same height this sector is going to move to. (Yes, I know it sounds complicated but it really isn't.)

I understand now, thanks.

EDIT: Vrack3's numeric triggers are pretty helpful too.