Should I test my landing page with Google Ads' native tool or build my own A/B test?

Native platform testing (Google Ads, Microsoft Ads)

These platforms run experiments at the campaign or ad group level, automatically splitting traffic between variations. The advantage: minimal setup, built-in statistical significance indicators, and traffic split management handled by the platform. The downside: you're limited to variations the platform supports and can't always test radical page changes.

Custom A/B testing (your own infrastructure)

You control the entire test—traffic split, duration, which metrics matter, page design freedom. This lets you test drastically different approaches. It requires more technical setup and you must calculate statistical significance yourself.

When to use each

Use native tools for straightforward tests: different ad copy sending to nearly identical landing pages, or testing landing page headline and CTA button color with similar layouts. Use custom testing when you want to test completely different page designs, radically different messaging approaches, or need specific audience segments tested differently.

A practical hybrid

Many teams use native tools for quick, small-scale landing page tweaks while running custom tests for major redesigns. This balances speed with control.