Over the years, I've worked with many folks who had no prior project management training, so I've learned how to explain the essence of project management in an interesting, memorable, and succinct manner. I'd like to take this opportunity to do the same for you.
What is a Project?
Every project has a start date and an end date (i.e. temporary), and every project should be unique in some way (i.e. you shouldn't be doing the same project over and over again). If it's not unique, that's fine, you just shouldn't be calling it a project; instead, call it a process or a system. Basically, a project is a one-off thing that begins, ends, and creates something unique. So, a wedding, a software implementation, or a vacation would each count as a project.
What is a Project Manager?
A project manager is the person who is responsible for the project. You could think of a project manager as an "umbrella person", who covers every single aspect of the project. Nothing should be outside of their purview. The project manager gets things done through her team members, and is considered successful when the deliverable is successfully completed according to the schedule and budget. If a project needs to be controlled and managed well, you need an excellent project manager.
What is Project Management?
Project management is the art of getting things done. It's about planning out a project so that you're consciously aware of all the risks, tasks, and expenses involved. The statistics show that companies who properly use project management principles waste 13 times less money. So project management isn't just all talk; it's a cost-saver.
I often refer to PMs as the "glue" of the company. They plug into every facet of the organization, and no one can hide from them. As soon as you see a project manager walking towards you at lunchtime, you know you're going to get asked about the status of one of your responsibilities. So you'd better be ready for her.