Random walk time series python

1. What is random walk series in time series data?
2. Is Arima random walk?

What is random walk series in time series data?

A random walk is another time series model where the current observation is equal to the previous observation with a random step up or down.

Is Arima random walk?

ARIMA models are a very general class of forecasting models that includes random walk models and more elaborate models whose forecasting equations may include lags of the differenced time series (so-called auto-regressive or "AR" terms) and/or lags of the forecast errors (so-called moving-average or "MA" terms).