The Statement of Financial Activities is the charitable equivalent of a Profit & Loss report for ordinary businesses, which is extended by including balance sheet information for the movement in the funds.
It uses standard classifications of income and expense which are intended to assist with the comparison of different charities.
However, these classifications are then divided according to the different funds which they were paid out of making the whole report far too complex to read easily.
If the SOFA were an Olympic dive, it would have a degree of difficulty of 4.9 out of 5!