There's an intruder in my space. In fact, he's in yours as well. Every time you turn on your TV or radio to watch or listen to your favourite program. Every time you open a magazine to read an article he's there.
Traditional advertising relies on interrupting you. Television prides itself on mini-cliffhangers to create space for ad breaks. Advertising is where the money is after all. But with all the new technology today, people are able to avoid advertising at almost every turn. Modern PVR recorders mean that people and pause, and then skip, ads as they watch their favourite programs. You are paying a large amount of money for someone to ignore you.
Advertising online takes a different approach. Making use of the free online tools you can have a blog that people read because it is relevant to them and they want to read it. You can have your website optimized for search Engines (Search Engine Optimisation) so when people search for answers online, your website is found. Effectively they are inviting your message into their space. The costs are drastically reduced as well.
You no longer have to be the big bad wolf, forcing your way into the head-space of potential customers. You can set up your online profile and soon your customers will be willingly inviting you into it.