Autonomous underwater gliders uniquely combine long-endurance autonomy with high-resolution, mobile profiling to provide targeted, four-dimensional views of the ocean. As part of the Global Ocean Observing System (GOOS), OceanGliders facilitates the integration of glider-based observations with complementary observations from other observing platforms, yielding a coordinated, multi-scale approach to routinely monitoring ocean conditions. OceanGliders delivers near-real-time measurements for operational purposes (e.g., numerical weather prediction) and science-quality data for research and other societal uses, ensuring that glider observations contribute to both immediate applications and long-term understanding of ocean change.