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Jitter measures the variation in latency over time, rather than latency itself — how consistent, or inconsistent, delay is from one moment to the next.
Why Consistency Matters More Than You'd Think
A steady 100ms delay is often less disruptive than latency that jumps unpredictably between 20ms and 200ms, since real-time applications struggle to compensate for unpredictable timing.
What Causes High Jitter
Network congestion, unstable wireless connections, and routing changes mid-session are common contributors to high jitter.
Why It Matters for VoIP and Video
Applications sensitive to timing, like video calls and VoIP phone systems, are particularly affected by jitter, since inconsistent packet arrival disrupts smooth audio and video playback.
