Facebook – is the largest and most famous social networking site used by around 1.7 billion active users worldwide. They also own Instagram, a social media sharing site. 2.Google Plus – After the fall of Orkut, Google launched its own social networking site integrated with Google and various other Google applications. Named Google Plus. This service was a serious competitor in the eyes of Facebook founder Mark Zuckerberg. Currently, Google Plus only has 111 million active users. 2. Collaborative Answers (Q&A) – Collaborative Answers or also called question and answer sites are sites that facilitate the exchange of knowledge between users. One of the first websites to create this type of community was Answers.com. From 2005 to 2009, Google displayed definitions related to this website. Many websites focus on multiple topics and all kinds of interests (Quora, Answers.com, Yahoo Answers, etc.). But some websites focus only on certain sets of topics, such as Chegg (for academic help and Q&A). and Fixya (for products and its answers to consumer-related questions). Currently, the most popular question-and-answer site is Quora. Some of its competitors are ChaCha.com and