Everyone has heard about the 80/20 rule. You remember how it goes - we wear 20% of our clothes 80% of the time, or 80% of what we do doing the day is only 20% effective. The notion was coined by an Italian economist called Pareto - hence the 'Pareto Principle" - and his ideas have entered mainstream thinking.

More generally, of course, it is a common rule of thumb in business: e.g., "80% of your sales come from 20% of your clients." In business, for example, Microsoft noted that by fixing the top 20% of the most reported bugs, 80% percent of the errors and crashes would be eliminated.

So far, so good. But what if you found out that - let's take your website, for instance - the Pareto principle was not so robust? That 80% of your major keywords only account for 20% of your sales? In other words, by focusing on a handful of major keywords you may be missing out on the 'real' keywords that prospective customers are actually using to find your product or service.

Most webmasters apply the 80-20 rule: that the top keyword provide 80% of the business, but in practice, this has proved to be the opposite. In other words, the keywords that are most sought after are actually rarely those that provide the most business.

Let me put it another way: your web pages are much more likely to gain more of their search engine referrals via a mixture of low-volume search queries instead of a tight bunch of keywords. And this means that by focusing on identifying the keywords which receive a lower volume of search queries you will increase in the overall amount of prospective customers from, say, Google, to your website.

What are these keywords? And will they actually increase my visitor numbers?

Well, keywords such as this are generally recognised as Long Tail Keywords. "Long Tail" because they are phrases that are usually made up of more than three words. For instance: "Paint" is not long tail, but "Outdoor paint for wooden shed" is long tail. Or, take "shoes": "Adidas running shoes" is almost there. But "Adidas running shoes for women" is a long tail keyword.

Can you see the difference between "horse training" and "quarter horse training products"? Here is another example: 'Credit Cards' is the general keyword but effective long tail keywords within this niche could include: 'good low cost credit cards for nurses', 'credit cards for people with bad credit', 'credit cards with low interest', 'benefits of corporate credit cards', and so on.

The fundamental thinking about long tail keywords is that because there is less competition for them, it is far easier to achieve an optimal ranking with the search engines. Moreover, it's much more likely that people who enter particular long tail keywords are highly likely to be actual customers, rather than web surfers. If you can optimise your web pages while delivering high value, informative content that matches those particular search queries you are highly likely to attract visitors who are actively seeking actual information about products using your long tail keywords and other, similar, phrases.

And there's no doubt that long tail keywords are a highly effective at attracting traffic. What's more important, there are thousands and thousands of long tail keywords which no one or very few people are pinpointing so can easily be utilised.

Here, then, are four major reasons why you need to consider the use of long tail keywords to make your web pages user search engine friendly:

First, focusing on long tail keywords will slowly but surely lead to more search engine traffic because you will have many, many web pages indexed and ranked for specific phrases related to your products or services. This means higher visibility and so a greater volume amount of search engine traffic.

Next, long tail keywords lead to higher purchase ratios. Visitors who visit your web site because they have entered long tail search phrases are highly likely to buy your product or service or follow through on affiliate programs. By focusing on these long tail phrases, you are actually zeroing in on a vast market of potential buyers.

Third, long tail keywords lead to higher page ranking because of there is generally far less competition. There is so much more scope for variation when you start digging for the phrases that people actually use when they enter search terms.

Finally, using long tail keywords means that your sites have the potential for greater monetization. People who find your site because they used a search engine such as Google or Yahoo are high value for this reason: they are people who are looking for explicit information. So they are highly likely to follow relevant advertisements or subscribe to your blog feed or ezine.

So here's the nutshell: more long tail keywords equals more potential customers equals more likely sales. Good luck!