Secondary sources provide in-depth information on a topic while also arguing for a specific perspective on the topic. Secondary sources are useful for in-depth analysis of your topic and for learning about scholarly perspectives on your topic.
Online resources such as blogs, news-outlets, online magazines, and thinktanks can be excellent sources of information. However, while all information sources must be critically evaluate, websites need special scrutiny because they are often not peer-reviewed and the bar for publication is generally lower than traditional media.