An SEO link building tool can have many features; as many features as the developers of the tool wish to add to it. But there are a few of these features that are considered the most basic and without them the link building tool would be a pretty useless tool since it wouldn’t be able to create any links at all. One such feature is a content feature. Since all the links are going to be added to the content, the tool could never work without any content unless it was able to create its own. Another important feature for the link building tool must be a configuration feature using which you can configure the tool properly.