Project Management is the application of knowledge, skills, tools and techniques to project activities to meet project requirements***.
Usually, the project team manages the work in the project which typically involves:

Competing for demands of scope, time, cost, risk and quality Stakeholders with differing needs and expectations Identified requirements.The Project Manager plays a critical role in managing the project. Depending on the organization structure, the authority and responsibility of the Project Manager may vary.Over time, the Project Management role has evolved into a Well-defined discipline that encompasses all the different activities and skill-sets required for successful implementation of a project.
*** As defined by PMI®

A project can be defined as a temporary endeavor undertaken to create a unique product or service***.
Projects are different from other ongoing operations in an organization, because unlike operations, projects have a definite beginning and an end – they have a limited duration.Projects are critical to the realization of performing organization’s business strategy because projects are a means by which the strategy of the company is implemented.Projects also involve one or more elements that have not been done in the past and are therefore unique. A product or service may be unique even if the category to which it belongs is large. For example, although several residential complexes have been built in the past, the creation of a new house will be a project because each facility can have elements such as a unique – location, customized or adapted design, regionally available resources, and/or discrete owners.
*** As defined by PMI®***

PMP certification is globally the most recognized and respected certification credential in the field of Project Management. The PMP designation following your name tells current and potential employers that you have a solid foundation of project management knowledge that can be readily applied in the workplace.