How to index web 2.0 links on search engine?

Hi, 

Is there anyone, who may help me for learning about, How to index web 2.0 links on search engine?

We know that web 2.0 are valuable for searching engine ranking. If I create any web 2.0 link, do I need to index on search engine? or it will be index automatically on search engine.

If anyone help me, I would be pleased.

Thanks