I am Akram Rahimiyan, I have two bachelor's degrees in Software Engineering and a bachelor's degree in Business Management and a master's degree in Business Management in Marketing, and because of my interest in business and marketing research, I have written this book. I hope this book Useful for those interested in business and commerce. I am honor to dedicate this book to my compassionate parents, who have offered unwavering support and encouragement to write this book during quarantine due to the pandemic of Covid-19. They have been constant cheerleaders through every academic and personal endeavor in my life.