Oh @christopherbunn one more thing: our current automl user guide doesn't explain what
I think its ok if you just say it's one of the parameters which controls the stopping criterion for the automl search, and that it tells automl the maximum number of pipelines to train and evaluate. Something along those lines. You don't need to describe the automl algorithm in further detail, even though we don't do that right now.
I filed the new issue here: #1203. It makes sense to add some more context to this in the user guides. I'll grab it soon, it shouldn't be too difficult to accomplish.