This is the most important question that you can ever answer if you are currently looking for a new opportunity. If you cannot answer this question definitively, then your chances of landing a new job will be substantially limited. By the way, the answer to this question has nothing to do with you being a dynamic, hard-working, results-oriented professional. It has more to do with the value you bring to an employer. What are you good at? What do you do better than most people? What is your "X" factor?
There is an easy way to formulate your answer to this important question. Here are a few questions to get you started:
1. What do you have a strong knowledge of? These are hard (technical) skills. Things like project management, new business development, software development, change management, etc.
2. What value do you bring to a company? At the end of the day, what is a company getting by hiring you? Could it be your industry connections? Could it be your industry expertise as a thought leader? Could it be your number of years of experience? Could it be that you have solved a number of the same problems that this potential employer is currently facing?
3. What are your top three achievements? As you look across your career, what accomplishments are you most proud of? What have you done that you can hang your hat on that really made a difference for your past employers?
4. What is your market differentiator? What makes you stand out? How are you different from all of the other engineers, accountants, project managers, or executives currently in the marketplace?
5. What are your best marketable skills? Maybe it's your recent degree. Maybe it's a recent certification. Maybe it's your years of experience in a particular industry sector. Maybe it's your ability to deal effectively with customers.
As you can see, answering these five questions above gives you the information you need to answer the bigger question of why an employer should hire you. You can use a combination of your answers above or simply select one of the five answers when communicating your value. It all depends on the opportunity at hand and what problems the employer is looking to solve.