The Neo4j BI Connector is a tool that enables direct access to Neo4j graph data from business intelligence (BI) tools, allowing users to avoid coding and custom scripting. The connector works by transforming SQL queries into Cypher and fetching results, with an in-memory SQL Execution Engine that can handle standard SQL queries. Performance tuning and troubleshooting are crucial, as the driver may spill data to disk if it exceeds a certain memory limit, affecting query response times. Troubleshooting involves enabling query logging, using Neo4j monitoring tools, and analyzing logs for errors or excessive connections. The BI tooling layer also plays a role in troubleshooting, with log level adjustments providing insight into what the tool is doing. Overall, the Neo4j BI Connector enables powerful data querying and analysis capabilities in popular BI tools.