Short answer
The document is removed from the Index, and AskTuring will no longer use it when generating responses.
Full explanation
When you delete a document from an Index, it is permanently removed from that Index’s dataset. This means:
It will no longer appear in search results.
It will no longer be used to generate responses in any query that references that Index.
Any previous responses that included information from the deleted document will not be affected or and will not be removed from your chat history.
Deleting a document from an Index does not delete it from your computer or any other storage location where you originally saved it. If you want to use the document again, you will need to re-upload it.
There is usually no need to delete outdated files. AskTuring is designed to always try to use the most recent and most relevant information within your Index when generating answers.
Tips
If you remove a file by mistake, you can re-upload it at any time.
Keep a local copy of any document you choose to delete from an Index so you can restore it later if needed.