MongoDB 3.2 introduces several aggregation enhancements, including the $lookup operator that implements left-outer equi-joins in the MongoDB Aggregation Framework. This allows developers to combine data from multiple collections within a single query, reducing complexity and improving performance. The Aggregation Framework is also being extended with new operators, such as array operations, standard deviations, square roots, logarithms, and more. These enhancements aim to extend the options for performing analytics on the live operational database, ensuring that answers are delivered quickly and reflect current data.