This document discusses why Python is a popular programming language for data science. It notes that Python has a clean syntax, expansive library, and large user base. Additionally, major companies like Google use Python for various applications. The document also provides examples of what businesses use Python for, including building data pipelines, descriptive analytics, machine learning, and data science tasks like clustering and prediction. Finally, it outlines some common tools and processes used in working as a data analyst or scientist, such as cleaning, reshaping, and analyzing data in Python.