Google Cloud Platform (GCP) is Google's public cloud, third by revenue behind AWS and Azure but disproportionately strong in data and machine-learning workloads. BigQuery, Vertex AI, Spanner, Pub/Sub, and the GKE flavor of Kubernetes are all considered best-in-class for their respective categories.
Adoption has historically been stronger at data-heavy companies (Spotify, Etsy, PayPal, Twitter pre-Musk) than at general-purpose enterprises. The certification track (Cloud Engineer, Professional Architect, ML Engineer) is competitive with AWS's in technical depth but has thinner job-listing presence.