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Today, social networks and media have become an integral part of everyone's daily existence. The rising popularity of social media has increased tenfold during the times of COVID-19 when people were forced to isolate following social distancing norms. Between July 2020 and July 2021, active social users grew to 520 million. The COVID-19 crisis has resulted in the usage of digital platforms not only for entertainment purposes but also for educational and corporate reasons. Hence, the spread of information has increased excessively on every social media platform. This has resulted in an equal rise of false information. The term infodemic was widely introduced during COVID-19 to explain the harmful effects of misinformation through social media. The chapter, hence, argues that the advantages of social media surpasses the dangers of misinformation. It discusses the role of COVID-19 in digitalization and how social media has helped in provision of various industries.

The number of smartphone users has increased from 3.6 billion in 2016 to 6.25 billion by 2021, which shows that mobile phone usage has increased dramatically over the past few years. This is due to the development of mobile computing applications like commerce, healthcare, e-learning, etc. The use of mobile devices has resulted in an exponential rise in the amount of data generated and as a result the amount of energy consumed has increased. This is where cloud computing plays a major role. Cloud computing has transformed traditional mobile computing. The new mobile cloud not only provides on-demand services but also data storage and increased energy efficiency. Through mobile computing based on cloud computing, mobile device functions can be virtualized, reducing power consumption. In this paper, the authors survey application and potential of mobile cloud computing and present the energy-efficient ways. Also, the paper discusses development opportunities of mobile cloud computing. The research also mentions some of the major challenges in current mobile computing technology.