When dealing with time series data in finance, it is important to understand the concept of normalization. By adjusting a time series to fit within a specific normal, standard range, we are able to more accurately analyze and compare data over time. This is achieved through various mathematical techniques, such as scaling and standardization. Normalization allows us to better understand trends and patterns within the data, making it a crucial tool in financial analysis. Remember, a normalized time series is a key component in accurately interpreting financial data.