Suppose you buy 100 XRPs at a 6000 Sats. If it is a single limit order, you can only sell the 100 XRPs at 7000 Sats. Adding multiple targets means you can decide to sell those 100 XRP at different price points in parts. For example, you may sell 40 XRP at 8000 sats and remaining 60 XRP at 7000 sats. Adding targets offer you more control over your orders as you may utilize multiple price points to close your positions in parts.