Google penguin Algorithm

Penguin algorithm built to predict the development of the black hat techniques of link building techniques. So if playing in OnPage Panda algorithm, then the algorithm will play in Off-page Penguin and discover the character of the backlink.
To insure you are safe in doing link building, then there are 4 things you need to consider in doing link building:


Are backlinks from websites that sufficient quality? Not a new created website yesterday just to be a backlink for web-optimized.

Do backlink comes from a relevant page? Where the connection is between the text which was to discuss the issue.

Are backlinks are from web who also possesses a good profile? And how the overall backlink profile of a web of our own?

Are backlinks coming towards your web diverse in every path, especially anchor text containing keywords?
4 of the above is what needs to be a major concern for those who do link building. Why this should be your concern? Since it is really difficult to get out of the penalty penguin algorithm if you have been exposed. You should clean your backlink to the proper target, otherwise your website will never go out of the penalty area.