An "overview article" is a brief and simplified version of a longer piece of writing that gives an overview or summary of a topic. It provides a general understanding of the subject without going into all the specific details. Full definition
Mark Z. Barabak has a good overview article about political campaigns» use of new technology in the LA Times (requires registration), focusing on podcasting and blogs but with some information about wireless / mobile technology and cable tv. (epolitics.com)
When writing overview articles such as «No Longer a Weak Department of Power? (ejiltalk.org)