How to enable Q&A feature in PowerBI?

I am new to PowerBI, I read about the feature of Q&A in PowerBI, I enabled it in Page Information property and entered some tags used in the database frequently.

I published it on web and in the settings> datasets> Featured Q&A questions I also entered some questions like below:



But it didn't worked. Then I read that we need to add workbook for that, I created a workbook and uploaded it using OneDrive but it's not working?

Can someone explain or Is there any tutorial or article that explain each and everything how to create excel sheets for Q&A.

Thanks for help.