[help] About the nofollow link.

Hi,All.
I use wordpress to create my website.
I saw many expert talked about nofollow tag
I want to know the nofollow on comments is just block the link in it or block the content at the same time?
I want to write review on the comment ,is that the same as post seen by google?
Sorry for my poor english and newbie question.
hope someone will give me a hand.

No follow only pertains to the actually links and not the content.. Writing comments is a great way to update your page with new content. Google will be able to read it, unless you programmed it not to.