The document discusses the importance of investment portfolio rebalancing for achieving desired financial goals, highlighting that it involves planning, monitoring, and adjusting investments based on the investor's risk profile. It illustrates this with Mr. Gupta's example, showing how timely rebalancing can lead to significantly higher returns over time compared to non-rebalanced portfolios. The document also describes different rebalancing strategies, such as time rebalancing and corridor rebalancing, emphasizing the need for continuous portfolio health checks.