I have huge text data, and I have to learn a lot of entities to label in each text, how can I take use of active learning for labeling the dataset automatically?
How can I ease my work a little bit? I couldn't find proper documentation about it.
no worries! I had found the tutorials on their YouTube channel.
Ah cool, glad the video was helpful! 
The strategy described in the video is also what I would have suggested to get started.
You can also use custom recipes to implement your own semi-automated workflows and decide when to send out an example for annotation and when to skip it. See here for an example: https://prodi.gy/docs/named-entity-recognition#active-learning-custom