The text length

For the most of the websites, it is not good to include more than 3 paragraphs in one web page. It is bad for these reasons:

• The robots are taking care only the first paragraph of the page,
• Nobody will start reading your third paragraph, it is a screen, not a paper!

Unfortunately, there are exceptions of some websites and blogs that they have to include a lot of text inside (for example history portals, news, encyclopedias etc)

The point:
Use text in order to help the visitor directly finding his information. Not too many paragraphs.