Read the passage. Circle the best answer A, B, or C to each of the questions.

With approximately 2.96 billion users as of 2022, Facebook is undoubtedly one of the favoured social networking sites in the globe. As for students, they use Facebook for different purposes, including entertainment or academic learning. First, it is a relaxing channel where students comfortably tend to vent their negative thoughts on their school life via a status, share unforgettable memories, or watch multiple funny clips to relieve stress. Additionally, they can easily connect with those who have the same interests through various Facebook pages where they enjoy reading top comments or discussing hot topics with each other. Second, Facebook, regarded as the biggest knowledge platform, enables learners to get access to an array of free learning materials and even ask for specialised knowledge from other friendly users. Besides, it’s very convenient for students to create a Facebook group chat on Facebook Messenger to upload and share lectures, prepare for class presentations as well as do assignments together. In short, Facebook can contribute to students’ academic achievements if they take full advantage of it in an appropriate way. 

What is the passage mainly about?