Anchor texts have always played a good role in link building activities, But after Penguin update anchor texts are playing very important role in external link building. After penguin update, Using exact match anchor text for link building is not preferred because if you build lots of links with same anchor text than Google may consider those links as spam, and your website may be penalized under penguin update.
|Bad Distribution of Anchor texts|
|Even Distribution of anchor texts|
In Bad Link building profile, the anchor text distribution is uneven while in the good one, anchor text are distributed in a good way.