What does a digital storage oscilloscope do?

A digital storage oscilloscope captures electrical signals, converts them into digital data, and displays waveforms for analysis, allowing users to store, review, and troubleshoot signal behavior over time. 

A digital storage oscilloscope captures and stores electrical signals, allowing you to view, analyze, and measure waveforms over time.
It helps engineers troubleshoot circuits by displaying voltage changes, timing, and signal anomalies with high accuracy.