Think of the Internet economy as a farmer’s field full of little green plants. Each plant represents a business, and the stuff that makes them grow is traffic (just like rain makes real plants grow).
Now, imagine that in between the rain clouds and our fledgling plants, there is a huge funnel that collects the rain and pours it over the field. Let’s call this funnel Google.
Google’s job is to make sure that all the sprouts get a fair share of water (provided they are of good quality), and that any weeds that are harmful to the ecosystem aren’t watered. All day long Google funnels rain onto various different plants in order to help them grow.