With Knol, individuals are able to share their knowledge on subjects. The only stipulation, according to Google, is that you need is an account, a name and a desire to write and we'll take care of the rest.
Google thinks that you might want to use it to complement your blog. Blogs are great for quickly and easily getting your latest writing out to your readers, while knols are better for when you want to write an authoritative article on a single topic.
Except for the different format, you'll get all the things you've come to expect from Blogger in Knol. Like Blogger, Knol has simple web authoring tools that make it easy to collaborate, co-author, and publish. It has community features as well: Your readers will be able to add comments and rate your article, and, if you want, they'll be able to suggest edits that you can then either accept or reject. And, just like in Blogger, you can also choose to include ads from AdSense in your knols to perhaps make a little money.
One other important difference between Knol and Blogger is that Knol encourages you to reveal your true identity. Knols are meant to be authoritative articles, and, therefore, they have a strong focus on authors and their credentials. We feel that this focus will help ensure that authors get credit for their work, make the content more credible.
All in all, we think Knol will be a great new way for you to share what you know, inform people about an issue that is important to you, raise your profile as an expert in your field, and maybe even make some money from ads. Create your Knol right now for free.
Find out more here