Keywords are he life's blood of a website. Everything you do, from your blog, to article, social bookmarking, social media and video marketing, should revolve around your chosen keywords.
Selecting the right keywords to target makes all the difference. The SEO page of this blog has info on doing keyword research.
As a network marketer, when doing keyword research, you will go about it a bit differently than an affiliate marketer. Most internet marketers will not bother with a keyword phrase unless it is getting thousands of searches a month.
For the network marketer, if you are following up like you should, you would never be able to keep up with that many leads. Keywords that only get 10-20 hits a day are fine. These hits are going to be highly targeted too.
The big thing to look at is competition. If you are shooting for a highly competitive keyword, you better have your page highly optimized and be ready to go get hundred, if not thousands, of backlinks. That is more work than most of us will want to do, so it is better to stick with the "low hanging fruit".Try to find keywords that get enough searches to make it worth you time but are not overly competitive.