Also, as a side note, I found this link confusing. I was expecting it to take me to a list of pre-made estimators. Not a definition of what a pre-made estimator is. (maybe the glossary definition should link to a list of pre-made estimators?)
An Estimator is any class derived from @{tf.estimator.Estimator}. TensorFlow
provides a collection of
-[pre-made Estimators](https://developers.google.com/machine-learning/glossary/#pre-made_Estimator)
+[pre-made Estimators](https://developers.google.com/machine-learning/glossary/#premade_Estimator)
(for example, `LinearRegressor`) to implement common ML algorithms. Beyond
those, you may write your own
[custom Estimators](https://developers.google.com/machine-learning/glossary/#custom_Estimator).