The same query the other toolkit pages use. If you already ran it, paste those results in Step 2.
The page reads your tables, columns, measures and relationships so every name in the query is exact.
Each one answers a different question about your model.
Paste into a new query tab and select Run. Rename the tab (for example Check: Sales by region) and keep it: the queries are saved in the file, so you can run the same check after every refresh.