I'm not even completely sure what social signals are. I assume they are a type of backlink from social networks like twitter/facebook? Anyway I have a site and people keep telling me Social Signals is what I need for it to get some small beginner attention from Google. Would a Site like AddmeFast be good for this? I also heard LinkCollider also might work for this. I would like to do it Manually I dont have any money to pay for them. Input?