Ordinary bread flour refers to high-gluten flour, which has a relatively high protein content and makes the dough easier to chew. Used to make noodles, dumpling wrappers and other foods that require chewy texture. Steamed buns, steamed buns, and pizzas that require leavened dough are also better. Flapjack would be worse.
In addition, there is a kind of bread flour that is a pre-mixed flour with other raw materials added inside (sugar, egg powder, yeast powder, etc.) and can only be used to make bread.