A target-date fund is an investment option that simplifies retirement planning. It automatically adjusts the asset allocation based on the target date, gradually shifting from growth-oriented assets to more conservative investments as the target date approaches. 

Target-date funds are commonly offered in retirement plans and provide a convenient, hands-off investment approach. Investors choose a fund based on their target retirement date and the fund takes care of rebalancing and adjusting the portfolio over time. 

This aggressive-to-conservative switch doesn’t happen overnight. Instead, a target-date fund operates on a glide path. Think about an airplane descending on final approach to land. A target-date fund’s glide path employs a similar rationale — easing the investor to a safe financial destination at retirement.

Target-date funds are best suited for those who prefer a set-it-and-forget-it strategy. It’s important to note that target-date funds can vary in their specific glide path and investment strategy, so investors should consider their risk tolerance and financial goals when selecting a fund. 

Overall, target-date funds simplify the retirement planning process, providing investors with a convenient and efficient way to navigate their financial journey, creating a smoother transition to retirement.