Attraction vs. Interruption
Traditional shout-from-the-roof-tops style marketing is no longer effective, and it costs more than ever. This traditional marketing & advertising, otherwise known as "outbound," gives people messaging they don't want, when they don't want it, and where they don't want it. People fight against outbound tactics with DVR, XM Radio, "no soliciting" signs, caller ID, etc.
Inbound Marketing, on the other hand, gives people the information they want, when they want it, and where they want it. Smart companies, who supply consumers with this valued information, build trust and loyalty with their customers early in their buyer's journey. This is why Inbound Marketing yields higher results for a fraction the cost of traditional outbound strategies.