Many other SE sites have, in their FAQ, right below the scope line, a list of topics considered in-scope and sometimes also a list of topics considered out-of-scope.
For example, the beginning of money.SE's FAQ reads:
What kind of questions can I ask here?
Personal Finance and Money - Stack Exchange is for people who want to be financially literate, find ways to save money, minimize taxes, invest wisely, plan for retirement, etc. Also for financially-savvy amateurs, DIY-investors & personal finance pros.
If you have a question about:
- Personal investing and asset allocation
- The financial aspects of homebuying
- Best practices for saving for retirement, education, and other goals
- Strategies for creating and sticking to a budget
- Strategies for earning and saving more money
...then you've come to the right place - we want to help you!
What about other money and finance related questions?
Please note that the following subjects are considered off-topic here:
- Questions about corporate or government finance
- Academic questions about economics or questions about economics that have no bearing on personal finance
- Argumentative questions about personal finance or government policy
- Requests for specific buy/sell advice; e.g. "should I sell X?" or "should I buy Y?" or "will X continue to go up?"
What should go in our "in" and "out" lists?
Neither of the following sources is binding, but both could provide inspiration:
Our existing collection of questions
The example questions voted on- and off-topic on our Area51 proposal