• When a script calls a function, the interpreter adds it to the call stack and then starts carrying out the function.

• Any functions that are called by that function are added to the call stack further up, and run where their calls are reached.

• When the current function is finished, the interpreter takes it off the stack and resumes execution where it left off in the last code listing.

• If the stack takes up more space than it was assigned, a "stack overflow" error is thrown.

Sources: Call stack - MDN Web Docs Glossary: Definitions of Web-related terms | MDN. (2022, September 21). https://developer.mozilla.org/en-US/docs/Glossary/Call_stack