Hi Pooja,
Tripoto is a platform to share one's travel experience in way of blog writeup or through pictures with other Tripoto members. Anyone can participate in Q&A session (like I picked up your question to respond) and there are contest to participate in. All these activities may earn you credits and this credits can be later redeemed for travel packages available on Tripoto. As you start exploring Tripoto more, you should be comfortable using this and earn more points.
Happy traveling and cheers 🙂