> ## Documentation Index > Fetch the complete documentation index at: https://docs.inbox.adraa.ai/llms.txt > Use this file to discover all available pages before exploring further. # Knowledge base > Give the AI your own content so it answers from your documentation. The knowledge base is the content the workspace AI draws on when it answers customers. Add your documentation and website pages, and the AI grounds its [replies](/guide/ai-replies) in them instead of guessing. Manage sources in the agent console under **Knowledge**. ## Sources Add knowledge from: * **Files** — upload documents your team maintains. * **Website** — point the crawler at your site to import pages as content. Adraa Inbox indexes each source so the AI can retrieve the most relevant passages for a given customer message. ## How it's used When the AI generates a reply — either as an automatic answer or from a flow's AI response node — it retrieves matching content from the knowledge base and uses it to ground the response. Better and more complete sources lead to better answers. Knowledge retrieval is only active when the workspace has the AI features configured. Without it, the AI replies from its instructions alone.