The removal of mural looking like President Joko Widodo's face with the words 404 Not Found triggered a wide range of reactions from the public, including some on Twitter, who saw the action as an anti-critical form of government. As a result, the hashtag #Jokowi404notfound became a popular topic and was used over 11,000 times on August 14, 2021. The purpose of this study is to look at how people use the hashtag #Jokowi404notfound on Twitter to protest the removal of murals. In August 2021, this study takes a qualitative approach, collecting data in the form of observation of media texts on Twitter's public timeline. According to the findings of this study, the hashtag #Jokowi404notfound was used to protest the government's anti-critical decision to remove murals as a form of suppression of individual freedom. When the public interest is at stake and the movement is mobilized by Twitter activists with large social media followings, the hashtag activism movement has the potential to drive and influence government policy. Messages to the government are also conveyed using various styles of language.

Following the COVID-19 outbreak in Wuhan, the Republic of China has become a major concern in the world. Besides the massive spreading information around many countries, including Indonesia, the information related to COVID-19 has also become an important issue both for the individual and also social media users. Social media has an important role in spreading the information and its associated analyses; as in January 2020, a CBS News correspondent Ramy Inocencio reported the COVID-19 case on his Twitter. The report became a big hit since many mainstream media and social media users around the world discussed it. In this respect Jürgen Habermas defines the public sphere as a discussion platform which allows individuals to express their opinions in public without interference. A qualitative approach is used in this research by taking the advantage of interviews as a data collection tool. It also captures that Instagram is the most frequently used by public of Jakarta to get information related to COVID-19. Meanwhile, Whatsapp is used to discuss and exchange information among them during outbreak. And the most frequently topic to be discussed are the number of COVID-19 case update and its wide-spreading.