Social media enables libraries to communicate directly with their customers and to strengthen library community relations.
Libraries are at the heart of the physical community in many parts of Australia. Social media is increasingly playing a major role in building digital and online communities around areas, interests and activities. It allows libraries to reach community members who might not be aware that a library can meet their information needs.
some of examples for National Library of Australia are:
WEB: http://www.nla.gov.au/
Facebook: https://www.facebook.com/National.Library.of.Australia
Twitter: https://twitter.com/nlagovau
Flickr: https://www.flickr.com/photos/national_library_of_australia_commons/
Blog: http://www.nla.gov.au/blogs
YouTube: https://www.youtube.com/user/wwwnlagovau