On the hunt for back links, there is a multitude of ways you can be pulled by his partner across the table. Therefore, it is useful to know about these practices decision to go to them from the road can or can detect them.
The classic, has heard of the now certainly have everyone who is concerned with are the nofollow links. In the nofollow links are other ways to put this, not all of which are evident at first glance. The simplest is safe if the entire page is in the meta tags set to nofollow. Since it is enough if one looks at the source code short and the culprit is unmasked. A little harder to see through such as already nofollow are backlinks that have been set by JavaScript, for as shown in the browser that everything is OK, but the backlinks from the search engines is not yet pursued. The gnarliest trick with distance, if the http headers of a page designated nofollow tag missing a long time. A link partner you should also check this out, for instance with the live httpheaders which can be activated as an extension in Firefox. Otherwise, there are still some good in this regard and free tools on the Internet.
Although already an old hat, yet very much used to Link betrug are so-called orphaned link pages – or orphaned pages mentioned. Here the link is usually set by a well-staged page that is linked not with the rest of the page, which is more or less is loose on the Internet. A link back from such a page does nothing, of course, since it is not connected to the remainder of the Internet.
Also with the help of Cloaking is targeted backlink scam operated. The principle here is simple: the user is just a different page shown as the search engine. And certainly it is then so that the user his link, the search engine looks beautiful but is not.
So there is a lot of details to which one should look for when backlink acquisition, not to buy a pig in a poke. Incoming review of the potential partner is worthwhile in any case.