In “Who Moved My Cheese?” Spencer Johnson introduces characters to explore change and adaptability: Sniff (embraces change), Scurry (takes quick action), Hem (resists change), and Haw (learns to adapt). The book offers key lessons for today’s rapidly changing work environment, emphasizing proactive adaptation, continuous monitoring of industry shifts, letting go of comfort zones, seeking new opportunities, moving quickly when needed, staying motivated through visualizing success, and focusing on the future.