A web app is a software application accessed through a web browser, providing dynamic content and interactivity.Web apps have characteristics like dynamic content, interactivity, accessibility, and scalability.Types of web apps include static, dynamic, and progressive web apps for various user experiences.CI/CD pipelines automate processes to help development teams build, test, and deploy software efficiently.CI involves automating code changes' build, test, and validation, while CD handles deployment to production.Benefits of CI/CD pipelines include faster time-to-market, improved quality, and increased efficiency in software delivery.Azure App Service is a PaaS offering from Microsoft Azure for building, deploying, and scaling web applications.Azure App Service features managed platform, support for multiple languages, and integration with other Azure services.Benefits of Azure App Service include faster deployment, scalability, and enhanced security features.Use cases of Azure App Service include building web applications, APIs, and mobile apps with ease.