Right now I want you to rid your mind of all of spam and garbage. Rid your mind of the techniques that are probably too good to be true in the first place, because if those techniques are working right now, they likely won’t be working later. Let’s put it this way; If you’re currently spamming people to get links, you’re almost wasting your time because eventually, Google will penalize you.
To the search engines, when you get a backlink, it is supposed to be a reward for good content and a quality site. If you’re buying backlinks, the search engines will view you as a cheater who wants to manipulate the system. The search engines have created filters to figure out who is selling backlinks. If you get caught buying from them, your ranking will suffer.
Finally you should look at whether or not a page is do follow. Do follow is simply the absence of the no follow attribute on your backlink. Google implemented no follow to allow webmasters to mention other sites without providing backlink juice to them. It is fairly simple to check, just view page source on the webpage and look before links. If it has rel no follow before a link then this webpage uses the no follow attribute and thus a backlink from here will not be useful as a boost to Google search engine results pages. A little tip, all WordPress blogs are default no follow but many use a do follow plug-in to eliminate this. Look for the ‘do follow badge’ or an image that says “you comment, we follow” on the blog. Most do follow blogs will use this image.
So, you see that you have 2,500 backlinks, but a competitor with 100 backlinks has a higher search engine ranking. This must be a mistake, right? Wrong!
How are you going about this whole link building business? Are you merely exchanging links with other blogs covering similar topics? While it is not a bad practice, it is definitely not the best one, as two-way links actually dilute the Google juice. You need to get one way link from authoritative sites and the best way to do this is to buy edu backlinks.
Another thing that factors into the algorithms of search engines is the kind of site that it links to. Some sites hold more credibility than others because not everyone can use them. A prime example of that would be a .gov or .edu backlinks domain.