Word of mouth is still believed to be the strongest form of advertising you can do. A recommendation coming from someone who has no affiliation with your business is the best kind. They are recommending your services to a friend, so firstly they are a trusted source and secondly they gain nothing from it - so it is a genuine reference.
Whilst, “word of mouth” style advertising is often the strongest, it used to be something we were unable to control; these days however, social media changes all of that.
