API Gateway is a service that enables developers to create, deploy, and manage secure APIs at any scale. Coursera's API Gateway catalogue imparts you with the knowledge of harnessing the power of APIs to connect applications and services efficiently. You'll learn to create, deploy, secure, and manage APIs, understand different types of APIs such as RESTful and SOAP, and utilize various API tools and techniques. Additionally, you'd get insights into API lifecycle management, API design principles, and how to leverage API Gateway for microservices and serverless architectures. Through this, you'll build your competency in creating scalable and secure API solutions, enhancing your profile as a backend developer, system integrator, or IT professional.