In a recent alert on Jakob Nielsen’s site, the “guru of usability” helps us understand the really important website analytics and how to interpret them better. He then helps us understand the ways in which to improve our analytics, particularly the dreaded Bounce Rate.

The bounce rate of a site is measured by calculating those who enter through any page and leave from the same page versus those who enter through any page and click-through to another page.

Recent research has shown that an increasing number of people are entering sites not though the home page, but through some deeper, interior page. This can be due to the increase of social bookmark sites like Digg and Del.icio.us, which points the web user to particular content. As a result, the bounce rate of most sites is going up.

To better understand one’s own bounce rate and how to reduce it, Nielsen recommends understanding the bounce rates of particular visitors. Alas, not all bounce rates are equal, just as not all visitors are equal.

There are basically 4 categories of visitors:

1. Those entering from the likes of Digg. These are the least important to you because they are a fickle bunch and will have unusually high bounce rates.

2. Those who enter from direct links from other websites. These visitors are in essence receiving a recommendation from some other site. People who follow these recommendations may not have been looking for your site or product directly. They have some degree of interest, but if the usability of the site is poor or does not match their expectation, the bounce rate will be high.

3. Those entering from search engine traffic (whether it be SEO or paid links) will have a specific interest in your brand and your product. They are actively searching and wanting to engage with your company. Nielsen state, “If they leave immediately, there is something wrong with your landing pages.” Check your usability, your copywriting, and don’t forget to modify keywords.

4. Loyal users are those that return repeatedly to your site. This is your core consumer audience. If they return repeatedly, they may only be checking for new content on the site. Upon finding it, they will engage longer with your site than many other visitors. As long as they keep coming back, it’s okay if this user has a low page count.

All in all, Nielsen recommends shifting your attention from the “unique visitor” as the gold standard for a site’s success. Because the majority of unique visitors will be of the #1 and #2 variety above. Instead, count loyal customers and convert them with new content, new products, new special offers just for them. And try your best to convert the unique visitor into a repeat visitor.

Make sure the site doesn’t have confusing navaigation and is light on the copywriting. Insure that there is a clear path for the visitor to follow and provide them with next steps. Don’t force them to guess where the special product or offer is, expose it.