Short answer
Not always. If your documents cover different topics, projects, or audiences, multiple Indexes can keep your results cleaner and more relevant.
Full explanation
An Index in AskTuring is a self-contained set of documents. If you only work with one type of content or project, your initial Index, called your "Default Index," may be enough.
However, if your documents span different areas such as client-specific files, internal policies, and research, splitting them into separate Indexes helps. This approach:
Prevents unrelated information from mixing into your answers
Makes it easier to manage who has access to what
Improves search accuracy by narrowing the scope for each query
Because each Index is isolated, your sensitive data stays separated by design.
Examples
One Index for training materials, another for compliance documents
One Index for each client or account you manage
One Index for marketing content, another for technical manuals
Why it matters
Multiple Indexes give you more control over accuracy, privacy, and organization. They are especially useful if your work spans multiple topics or you need to keep information strictly separated.