This document discusses augmented reality (AR) and its applications. It introduces AR, how it integrates digital information into the real world by blending new information into existing images seen through mobile device apps or web browsers. It then analyzes the advantages and disadvantages of AR, and explores its popularity and future development in Hong Kong based on an online survey. The survey found that while AR applications in entertainment and education are seen as most useful, its current use is still relatively low in Hong Kong, used on average once a month by most. However, most respondents were confident in AR's future development. The document concludes that AR is expected to become more popular while focusing on entertainment and education applications in Hong Kong.