Why did travel and tourism become the largest world industry?

Travel and tourism became the largest world industry due to globalization, advancements in technology, and increased disposable income among consumers. The rise of affordable air travel and online booking platforms made travel more accessible, while social media fueled the desire to explore new destinations. Additionally, the industry contributes significantly to job creation and economic growth, driving further investment and development in related sectors. As a result, it has grown to encompass a vast network of services and experiences worldwide.