Web 2.0 gives librarians new ways that they can reach their patrons. The tools used in Web 2.0 are free to use. The only costs involved with them are time and training. This can be a good thing, if your librarians are familiar with Web 2.0 tools. If they are not, then they may require a large amount of time learning and trying to figure out the tools. This unfamiliarity may lead to them not using the tools in the best possible way.
Web 2.0 allows librarians to disperse information to patrons where they will be likely to see it. Younger generations use social media sites frequently. Librarians can create an account for their library to publicize events or answer questions. These sites may not be around for a long time. They could disappear at anytime. All of the information on them would be lost. Also, if these sites are not maintained properly or integrated properly, then they will be unsuccessful and a waste of time.
Librarians can use Web 2.0 to provide better reference services to their patrons. They can answer quick reference questions while the patrons are still at home. This can be done using instant messaging, Twitter, Skype, etc. This is convenient, but there are advantages to in person reference interviews. The best approach to using Web 2.0 tools is to find out what the library needs. After that, research which tools would be the best way to solve those needs.