Chief Executive Officer - CEO

What Does Chief Executive Officer - CEO Mean?
The highest ranking executive in a company whose main responsibilities include developing and implementing high-level strategies, making major corporate decisions, managing the overall operations and resources of a company, and acting as the main point of communication between the board of directors and the corporate operations. The CEO will often have a position on the board, and in some cases is even the chair. 

Investopedia explains Chief Executive Officer - CEO
There are various other titles for the position of CEO including president and executive or managing director. The role of the CEO will vary from one company to another depending on its size and organization. In smaller companies, the CEO will often have a much more hands-on role in the company, making a lot of the business decisions, even lower-level ones such as the hiring of staff. However, in larger companies, the CEO will often deal with only the higher-level strategy of the company and directing its overall growth, with most other tasks deligated to managers and departments.