I used pandas to transform ohlcv data using the yfinace library and modifying it to calculate moving average convergence divergence, simple moving averages and perform technical analysis on stock market data. very efficient and easy to transform data that never had to look beyond it.
I mostly use it to work with tabular data and use it to convert data from one form to the other in terms of the format and the structure of the data. Financial data analysis like stock price is a good use case where Pandas really shines.