There are many different kinds of backlinks,

But only few of them will help you rank higher in the search engines. Back in the day, link building was easy. Google's search algorithm has improved over the past few years and has gotten more difficult to trick.

Thousands of thousands of websites that were attempting to manipulate the algorithm had their ranks drop as a result of the Penguin update. Google will undoubtedly continue to publish algorithm adjustments that punish websites with poor and artificial backlinks.