When a job is posted on RankJunction.com, students from colleges across India apply to it. The recruiters are flooded with resumes. Many a times, it is not possible for them to screen so many resumes in short span of time. Many recruiters then prefer Placement Quotient score (PQ score) to screen the candidates for next round. Some recruiters even make the PQ compulsory.
Hence if you have a Placement Quotient score, your chances of getting selected for next round are much higher.