What is the primary purpose of data extraction when using AI tools like ChatGPT?

The correct option is To pull out specific pieces of information from large datasets.

Data extraction, in the context of AI tools like ChatGPT, refers to the process of identifying and retrieving specific, relevant pieces of information from larger, often unstructured or semi-structured, data sources. This extracted information can then be used for analysis, decision-making, or to feed into other AI processes.

The final answer is $\boxed{\text{To pull out specific pieces of information from large datasets}}$