Web 2.0 consists of online social networks that allow users to communicate and share content. Online social networks allow people to connect but also have privacy and security issues. Blogs have evolved from online diaries and allow commenting. Blogs have advantages like providing up-to-date news but also disadvantages like being time consuming. Setting up a Blogger account only requires a valid email and basic profile information. Posts can be created and modified on Blogger and settings control privacy and layout.