Database Management Systems (DBMS) are software applications used for managing, retrieving, defining and manipulating databases in a structured way. Coursera's DBMS skill catalogue teaches you about the different types of DBMS including Hierarchical, Network, Relational, Object-oriented, and more. You'll learn how to design, build, and maintain an effective and scalable database system, understand SQL queries, normalization and indexing. You'll also get to explore more advanced topics such as distributed databases, data warehousing, and big data analytics. This knowledge is crucial for roles including database administrators, software engineers, data analysts, and anyone aiming to efficiently manage and manipulate data in a business environment.