For what Cloud Pub/Sub is used in GCP

Question:
In Google Cloud, what is Cloud Pub/Sub used for?

1. Storing and serving files
2. Managing virtual networks
3. Deploying applications
4. Messaging and event streaming

Answer:
D - is the correct answer. Cloud Pub/Sub is a messaging and event streaming service provided by Google Cloud, used for building event-driven systems and real-time analytics