It's a phrase that literally translates to "How They Were Done" and implies a process of creation or formation.
Here's how you can use it in different contexts:
* To ask about the process of making something: "Como se hicieron estos pasteles?" (How were these cakes made?)
* To describe the origin or history of something: "Como se hicieron las pirámides de Egipto?" (How were the Egyptian pyramids made?)
* To explain how something came to be: "Como se hicieron las leyes de este país?" (How were the laws of this country made?)
The phrase emphasizes the steps involved in the creation of something.