Google Cloud Functions is a serverless platform provided by GCP that lets you write individual functions and run them in the cloud without having to manage the infrastructure. For example, you can create a Google Cloud Function that automatically resizes images whenever they are uploaded to a specific folder in a cloud storage bucket. This way, you don't have to worry about managing the infrastructure for resizing images every time they are uploaded.
One of the cool things about Google Cloud Functions is that it can be triggered by various events, such as changes in a cloud storage bucket, a new message on a Pub/Sub topic, or an HTTP request. This enables you to create dynamic and responsive applications that react to real-time events. For instance, you can build a chatbot that responds to user messages in real-time by triggering a Google Cloud Function whenever a new message is received.