Final answer:
It is true that skimming a beef stock after degreasing is crucial for removing remaining impurities, improving the stock's clarity, flavor, and quality.
Step-by-step explanation:
True: After degreasing, it is indeed important to skim a beef stock to remove any remaining impurities. This process enhances the clarity and quality of the stock, ensuring that it is free from unwanted particles which may include excess fat, coagulated proteins, and other solids.
Properly skimming the stock not only improves its flavor and appearance but also ensures a more professional result suitable for a variety of culinary applications.