Web .2 understanding it How to use Socila bookmarking and socil networking sites ?

From The Web:
"For maximizing your marketing with the Web 2.0 market, let us see how to use social networking sites.
First create a personal informal profile that shows a more personal side of you. Next, find groups that fit with your interests and join them.
Do not spam, these are just ways to get yourself known without pushing your product or service. Lastly, utilize the on-siteblogs to show case your products and service. Remember that social networking sites are just one form of the Web 2.0 market that you can use for marketing. There are many more Web 2.0 website types and I am going to show how to use them
Also remember treatment is to be similiar both in social bookmarking sites like Digg and stumble Upon and social networking sites like face book and my space "