This is the first in a three-part series on the types of keywords you should be targeting. Section two will follow tomorrow, and the final installment will be published on Monday, so stay tuned! Special thanks to Virginia Nussey , Lisa Barone , and Adam Viener  for editorial contributions.
By strategically targeting keywords of varying competition levels you will see more and better qualified streams of traffic.
At a high level, search engine keywords  will fit into three core traffic profiles:
- “Head” – Popular, highly competitive, and broad keywords. These are typically one or two term keywords, such as “search marketing.”
- Mid-Tier or “Torso” – These are basically what they sound like: slightly longer keywords that drive mid-level traffic volume and are roughly mid-level competition.
- “Long Tail” – These are the longer, less popular keywords.
The long tail, in aggregate, actually drives more traffic and conversions than head keywords (again, in aggregate). The problem with the long tail  is that despite the fact that it drives a lot of traffic, it’s both difficult to manage, and nearly impossible to create a predictive model around. Let’s take a quick look at some interesting long tail stats:
- 56 percent of buyers who search use queries of three or more words, while only 7 percent use one word or an acronym 
- 20-25% of all Google search queries are unique 
- What Google describes as long tail advertisers make up half their revenue 
- Searchers are using longer queries 
- Site’s Information Architecture
- Content Creation & On-Page SEO 
The Heads or Tails? Series:
- Part One: Heads or Tails? - How to Profit From Long Tail Keywords that Don’t Exist 
- Part Two: Informing the Tail - Mid-Level & Long Tail Information Architecture 
- Part Three: Building Links & Creating Content for Mid-Tail & Longtail Phrases