There are many ways to achieve this at no cost or very little cost. One good way is to use a service like Traffic Swarm (See banner on left sidebar of this blog)
I suggest just sign up for starters to the free version and get used to what driving traffic to your site is all about. As you will see you can earn a residual income from this to complement your network marketing, however we are going to concentrate just on improving your rankings on search engines. You can read all about the options to make money using Traffic Swarm once you have it driving traffic to your site.