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Do tools like GlockApps show the whole truth?

Myth: What GlockApps or similar tools show is exactly what your audience experiences.

Reality: These tools provide valuable but incomplete data.

What they show: Baseline placement for test accounts. Authentication issues. Content-related problems. Provider-level variation.

What they miss: User-level engagement effects. The full variation across your actual audience. How engaged versus disengaged users differ.

Use testing tools as one input. Combine with postmaster data, engagement metrics, and other signals.

Instruments provide readings, not complete navigation. Use multiple sources.