Social networking allows people to connect with friends, colleagues, and acquaintances both online and offline. It enables people to stay in touch with friends and family, share ideas and opinions, and see what others are doing in their daily lives. Popular social networks like Facebook, Twitter, and Foursquare allow people to connect online, while offline social networks exist through friends, family, and local communities. Businesses can also use social networking to market products, reach different demographics through targeted ads, and reduce advertising costs. Spotify is a social music streaming service that allows users to access millions of songs for free, create playlists, and share music tastes with Facebook friends.