Apache Pig is a high-level platform designed to simplify the processing of large data sets in the Hadoop ecosystem. It uses a language called Pig Latin, which allows users to write complex data transformations in a more intuitive way compared to traditional programming languages. This makes it easier for data analysts and engineers to work with big data without needing extensive coding skills. Pig is built on top of Hadoop MapReduce, enabling it to handle large-scale data processing efficiently. It provides a rich set of built-in functions for data manipulation, making it suitable for tasks like data cleaning, transformation, and analysis. Overall, Apache Pig streamlines the workflow for big data projects.