How do you smooth out a noisy signal?
The easiest way to smooth a signal is by moving window average. A more advanced way is to use a Savitzky-Golay filter.
What is smoothing in signal processing?
In smoothing, the data points of a signal are modified so individual points higher than the adjacent points (presumably because of noise) are reduced, and points that are lower than the adjacent points are increased leading to a smoother signal.