The article describes a process that uses a GCP Cloud Function to connect to the Open Weather API, fetch weather data for a specific location, and insert the data into BigQuery. The Cloud Function is triggered by a Pub/Sub topic, which is a messaging service that allows you to decouple different components of your application.
Once the Cloud Function is triggered, it fetches the weather data from the Open Weather API. The Cloud Function then uses the BigQuery API to insert the data into a BigQuery table.