I think that the most important features of every library website are:

1. the layout should be welcoming and attractive by having lots of colours and images
2. the information they provide should be evaluated and well organised
3. should be easy to access from different users

By going at the Brimbank Library Website I notised that not all the events they post on facebook and tweeter are the same. But if you see the posts about the same events on facebook are more extended and with more illustrations than on twitter.