New Relic's NerdGraph API allows developers to query and manipulate data in a flexible and efficient manner using GraphQL. This enables developers to minimize superfluous API operations and reduce manual toil in data analysis workflows. With NerdGraph, developers can query various entities associated with their account, update workloads, create and manage tags, and fetch data for building New Relic One applications. The API explorer provides an interactive interface for building and running GraphQL queries, allowing developers to easily retrieve and process telemetry data. Additionally, NerdGraph supports interfaces, which enable developers to specify common fields that can be used across multiple object types. By using NerdGraph, developers can update integration configurations with mutations, reducing the overhead of working with their New Relic data. The API also provides tools for transferring data to code, such as copying curl statements and generating command-line ready queries or mutations. Overall, NerdGraph enhances developer productivity and eases the path for building powerful applications using New Relic's data.