It is a food for competition , opportunity to earn and a guide to a normal user.
Points are secured by performing certain activities and depending on the points allotted as elaborated in the given link.
It is your position in hierarchy of all members in Thakurani
After earning 10000 smartscore you can trade off your every score afterwards as equivalent rupees.
You can earn by becoming an expert member on the website and charging a fee for the query asked from you. A general user can also earn as Thakurani is willing to share revenue with a member whose page has been used for advetisements.
Besides being just numbers , they provide a medium to an expert to advertise himself and directly interact with students which are their potential markets.