How is investing through SIP better than investing through lumpsum? How does the value cost averaging help me give better returns?

Investing through SIPs helps you invest on a consistent basis. The markets may be moving up or going down but your monthly investment will capture the value at each point in the graph.

Since equity markets always move up in the long run, you ultimately benefit having made SIPs at lower price points. Why do markets always go up? Because they reflect the profits of companies which can both grow and increase their prices.