>>211943778In the English language, stock usually refers to the liquid made from boiling bones. It's not fancy. It's not a finished product. When cooking meat, the drippings are called drippings or juice. Caramelised residue in the pan after browning meats are called fond. Broth (disregarding "bone-broth" as a fancy word for stock) usually has more meaty flavour and is more of a finished product with salt added.
When making a pan-sauce after frying meat in it, adding stock instead of water gives a better result. Stock is also typically used in stews and other sauces. The gelatin and the flavour in it gives a better result than using water.