McDonald's is the world's largest hamburger fast food chain operating in over 122 countries. It serves more than 65 million customers daily and has focused on expansion globally from the 1980s to early 2000s. However, complaints of poor quality, slow service and unclean restaurants increased. To build its brand equity, McDonald's uses characters like Ronald McDonald in advertising to promise a fun experience and focuses on providing affordable, high quality food tailored to local tastes in different regions. It also offers healthier options and gives back through philanthropic programs to evolve with changing consumer preferences and tastes over time. However, it faces risks from increasing health consciousness, competition and changing customer needs.