There are many ways of getting backlinks. Again you can employ a link building company but you can also buy links directly from website owners. If you buy a link and the link is not nofollowed you are in direct contravention of Google's guidelines. In short if Google discover your purchased links your site may be removed from their directory. In general they will simply remove any value from the links you have bought rather than directly penalise you, however the effect can be the same, like...