The document discusses using MongoDB as a universal datastore for industrial Internet of Things applications. It presents the benefits of MongoDB, including its flexibility to store different data types in the same field, its scalability for storing large amounts of high-frequency industrial data, and its ability to simplify analysis by exposing natural data structures. MongoDB is seen as a perfect fit for industrial big data due to its performance, flexibility to accommodate variant data structures from different source systems, transport capabilities using BSON, and cost effectiveness.