This function resets the source website only.
This means the source WordPress website set in your data source. Not your remote websites where the dat is distributed to.
How does resetting the source website work?
What actually happens, when the API gets the posts/products from your WordPress website. The system marks the posts/products as imported. Then we only request the new data when you update or add new posts.
In some cases, you may want to re-import the posts/products again. Such as, you may have deleted something by accident. This function removes the imported status which allows the API torquiest the data again.