Google Cloud App refers to the applications or services hosted on Google Cloud Platform (GCP) that enable businesses to build, deploy, and manage their applications in the cloud. Google Cloud provides a wide range of services and tools to support application development, deployment, and management.

Here are some key components and services related to Google Cloud App:

1. Compute: Google Compute Engine allows you to create and manage virtual machines (VMs) to run your applications. It provides flexible compute resources with customizable VM configurations.

2. App Engine: Google App Engine is a fully managed serverless platform that allows you to build and deploy web applications and APIs without worrying about infrastructure management. It supports multiple programming languages and provides auto-scaling, load balancing, and automatic patch management.

3. Cloud Run: Google Cloud Run is a serverless execution environment that allows you to run containerized applications. It provides automatic scaling based on incoming request traffic and can be used with Docker containers.

4. Kubernetes Engine: Google Kubernetes Engine (GKE) is a managed Kubernetes service that simplifies the deployment, scaling, and management of containerized applications using Kubernetes. It provides features such as automatic scaling, rolling updates, and integration with other Google Cloud services.

5. Firebase: Firebase is a comprehensive development platform for building web and mobile applications. It provides features like authentication, real-time database, cloud messaging, hosting, and machine learning. Firebase can be integrated with Google Cloud services for more advanced capabilities.

6. Cloud Functions: Google Cloud Functions is a serverless compute platform that allows you to run event-driven code in response to events from various sources. You can write functions in languages like JavaScript, Python, or Go, and they are automatically scaled based on demand.

7. Cloud Services: Google Cloud Platform offers a wide range of additional services that can be integrated into your applications, such as Cloud Storage for object storage, Cloud Firestore for NoSQL document databases, Cloud Spanner for globally distributed relational databases, and Pub/Sub for reliable messaging between services.

These are just a few examples of the services and tools available on Google Cloud Platform for building and hosting applications. GCP provides a robust and scalable infrastructure, along with managed services and developer-friendly tools, to support application development and deployment in the cloud.

For more detailed information on using Google Cloud Platform for application development, I recommend visiting the official Google Cloud documentation, which provides comprehensive guides, tutorials, and examples for building and deploying applications on GCP.