I got this off Wikipedia – and its about how to write effective and informative articles. Imagine you are writing a 3000 word piece – thats 10 paragraphs, each of 300 words. As this link says – each paragraph is to contain one topic. Additionally:
1. Each article starts with a ‘lead’ thats an introduction to the article.
2. This link is one of many about how to write for wikipedia.
This page sets out advice on how to write an effective article, including information on layout, style, and how to make an article clear, precise and relevant to the reader.