If there is one single phenomena that could best be said to represent the idea behind Web 2.0, it is blogging.

A blog is simply a website that will usually 'provide commentary or news on a particular subject; others function as more personal online diaries. A typical blog combines text, images, and links to other blogs, web pages, and other media related to its topic. The ability for readers to leave comments in an interactive format is an important part of many blogs.' according to Wikipedia.

Whilst blogs first came into being as online personal diaries, the ones that we are going to concentrate on in this book are those that are used for business of the type that are in fact now the vast majority.

Blogs have many attractions, the main one being their simplicity. Anyone who has the basic ability to use two fingers on a keyboard can begin to create their own blog, and, if you don't believe me, would the fact that my seven year old daughter has just started her first blog help prove it?

They can also be updated as often as you like, and many people do update their blogs two or three times a day.

This means that there is a constant stream of fresh new content available on blog sites, which is the reason that blogs are fast becoming the favorite sites of the major search engines, especially Google, itself the #1 search engine.

There is no need to know anything whatsoever about website creation or scripting language to create a blog.

No matter which blogging 'platform' (system) you use, it is always a simple question of following a very small handful of simple instructions, and you are good to go.

And, as the Wikipedia definitions suggest, a core function of blog sites is that they invite reader input and feedback in the form of comments.