The problem a single CDN can't solve
Every content delivery network has its own edge footprint, peering agreements, and occasional regional incidents. A site pinned to one provider inherits that provider's blind spots — a routing problem in one region becomes your outage, not just theirs.
A multi-CDN strategy treats content delivery the same way resilient infrastructure treats any single point of failure: assume it will occasionally misbehave, and build a path around it before it does.
How intelligent routing works
Traffic steering compares real-time signals — origin health, edge latency, cache hit ratio, and provider incident status — and routes each request to whichever path currently performs best for that visitor's location and network.
This differs from simple DNS round-robin, which splits traffic evenly regardless of which path is actually faster right now. Health-aware steering only shifts traffic once cache consistency, purge propagation, and rollback behavior are proven safe, because moving traffic blindly can turn a minor latency gap into a cache-consistency incident.
What this means for optimization work
Multi-CDN readiness is a delivery-layer capability, distinct from what a site's own audit measures. WebOptiva's audit reports on the origin, images, and page-level opportunities every site owner can act on today, while edge/CDN delivery is a separate infrastructure capability tracked on the product roadmap.
If your team is evaluating a multi-CDN setup independently, the same principles apply regardless of provider: define health checks before shifting traffic, keep a documented rollback path, and validate cache correctness before treating any routing change as final.