Project Management is not a new discipline. It has certainly evolved over the period. Without documenting it, our ancestor have been practicing it. The wonders of this world would not have been built without sound planning and delivery practices PMP certification .
It is only in the last century, we started writing and talking about it. Thus we have now plethora of standards & certifications like PRINCE2, PMP, guides like PMBoK and processes variations like Waterfall, Agile and hybrid of these two.
Businesses have certain objectives like growth, profitability, market penetration or market expansion, etc. The project management practices help organizations to organize, manage and meet these goals. Essentially, it enables businesses.
As PMBoK(TM) says, project is a temporary endeavour with specific objective and specific schedule (start, due date). It involve.to organize required activities and align resources to meet these objectives in a planned manner.