A more thorough explanation:

Definition: CEO is an abbreviation for Chief Executive Officer. The CEO is the highest-ranking executive in a company or organization and is responsible for making important decisions and leading the company towards success.

• Apple's CEO, Tim Cook, is responsible for the overall strategy and direction of the company.
• As CEO of Amazon, Jeff Bezos oversaw the company's growth from an online bookstore to a global e-commerce giant.
• The CEO of a small startup may be responsible for everything from product development to marketing and sales.

These examples illustrate how the CEO is the top leader in a company and has a significant impact on its success. The CEO sets the vision and direction for the company, makes important decisions, and is ultimately responsible for its performance.