The whole social media unit is lot more for me. We all learnt and aware of many things which we don’t know.I only know about face book and twitter through this unit I learnt about you tube , photo sharing and blog. The most appealing unit for me is blog. It is safe way to engage social activity and you can create your interest blog.It will help me in future. Libraries are using social media successfully and engaging their user. I am surprised to see the photo sharing site Historypin where libraries are preserving their history through history photos, video and audio recording.It is very good that young generation can see their history through this site.