Protecting personal information of users is a challenging task in the area of computer network security in the recent days. Personal information of users is highly essential to provide location-based services (LBS), and at the same, it is important to protect it from unauthorized users. Users cannot avoid the sharing of location information in the current era of social networks. In order to provide continuous LBS, personal data of the users are required. When users want to use social networks, they worry about preserving their privacy. Users normally prefer to maintain their location secure and safe in social networks for many privacy reasons. Security cracks in social network lead to tracking of user location, and they may misuse user’s data. In this paper, we present different techniques that are used to protect location privacy of the users. Also it helps us to select an appropriate technique to protect location information of the user.