Precautions while using Social Networking Sites
click on the lock
In Facebook, click on the lock icon in the top right corner of the blue bar and change the settings to private, or share them only with close friends. Importantly, also disable the setting that lets search engines link to your timeline. There is currently a lot of M&A activity in the social networking software industry. A significant part of what an acquirer buys when acquiring a social networking company is the community of users on the site. Your account, including personal information, trades hands from the old company to the new one as part of the transaction.