hi,

BPP stands for Bachelor's Preparatory Programme. This course has been introduced by IGNOU for those students  who want  to pursue higher degree course but do not have 10+2 certificate for that, since ignou is a recognized university in india, which  also recognized as a Central University by the University Grants Commission of India (UGC). so this certificate is valid, so you will face no issue regarding further studies or getting job.