Why should I get the Project Management Professional certification?

Credibility

Having a PMP certification will make you stand out among the other applicants who are competing for job positions. Having experience in project management is always a benefit for people who want to work in the field, but having experience along with PMP certification shows that you have what it takes to be a professional project manager. PMP certification isn't easy to achieve, and the Project Management Institute (PMI) that issues the test makes sure that their tests will truly measure the taker's ability to properly manage big projects.

International Recognition

Have you ever wanted to work in a different country? Working abroad can be difficult for some people, mainly because standards and certification for certain jobs can vary depending on which country you're working in. Project managers with PMP certification won't have to worry about running into these problems. The Project Management Institute is recognized by the International Organization for Standardization, so PMP certification can be recognized by almost every country in the world.

Better Pay

The old saying that 'you get what you pay for' is very true for PMP certification holders. Many companies see the valuable benefits of hiring a professional PMI accredited project manager, especially if they need projects done for high profile clients. Having a PMP certification is like wearing a large sign that says that you can handle difficult projects in an efficient and cost effective way. PMP certified project managers earn more than their non-certified counterparts since most companies are willing to give them more money in exchange for their proven expertise in the project management field.

source: http://pinnacle3learning.com/blog/three-career-benefits-pmp-certification-gives-job-seekers/