Academic libraries can use Facebook as a promotional tool to connect with patrons and promote resources. Some benefits include:
1) Posts can update patrons about new services in a familiar format.
2) Posts can go viral as patrons share with their own networks, increasing the library's reach.
3) Introductory posts can ease library anxiety for new patrons.
4) Patrons can directly communicate and build relationships with the library.
Challenges include gaining initial followers and resistance from some staff. Libraries should test different post types and times to engage patrons.