Global Load Balancing with Single Anycast IP

With Cloud Load Balancing, a single anycast IP front-ends all your backend instances in regions around the world. It provides cross-region load balancing including automatic multi-region failover which gently moves traffic in fractions if backends become unhealthy. In contrast to DNS-based Global Load Balancing solutions, Cloud Load Balancing reacts instantaneously to changes in users, traffic, network, backend health and other related conditions.

via Google Cloud Load Balancing – High Performance, Global & Scalable  |  Google Cloud Platform