SEO technology comes in several different varieties including coding, tools and applications, widgets and files. Using SEO technology to code a website properly is important so that search engine robots can properly crawl and index a website. A few years back webmasters struggled with developing search engine friendly URL's to make sure pages were indexed. At that time, frames also interfered with the crawling of a site. More recently many webmasters place emphasis on W3C validation, although the SERP's don't reflect this need right now.

Perhaps the SEO technology that search engine optimizers use most are tools and applications for doing their jobs.

SEO toolbars, Wordpress plug-ins and back link checkers are some common bits of SEO technology needed in order to serve the client. There are many toolbars that work with either Internet Explorer and Firefox browsers that will scan a page and deliver results such as keyword density, back link information and ranking data just to name a few.

Worpress plug-ins such as All in One SEO Pack or SEO Title Tag make the blog optimizer's job a lot easier. Over the years, SEO technology has been built by programmers into such software as Wordpress or even shopping cart software such as OScommerce or the beefed up CRE Loaded version that many features will work right out of the box. (so to speak).

But, it needs to be mentioned here that SEO technology really starts with the keyword research. Apps such as Wordtracker, Keyword Discovery, Google AdWords Keyword Tool and at one time the Overture Tool (before it took a dive) have all been valuable SEO technology for uncovering keywords that people use in their online searches.

Some other applications that are popular in the industry are those used to assess a page's keyword density. SEOChat, Ranks.nl and SEOBook all have popular apps for scanning pages and delivering needed results.

And, one bit of SEO technology that has indeed made the optimizer's job a lot easier are the dozens of tools for checking back links. From Google and Yahoo to Marketleap to Domain Pop to SEOmoz there are a plethora of methods and applications from which to choose now.

Widgets are also a bit of SEO technology that have become popular in the last few years. Widgets, if coded and promoted properly can be used as link bait to attract many links to a client site. If the widget goes viral, all the better since this will cut down the time it will take to do link-building for a website.

There are also other kinds of SEO technology that will help promote a website as well. Files such music, movie, PDF's, games and others can be used to publicize a website and gain valuable back links. Creating, coding and marketing these files can pay off many dividends in increased traffic and sales.

Although SEO technology has helped to advance the industry, the newest SEO technology has not, however, replaced the skill of the optimization specialist who needs to interpret the data and make adjustments accordingly. For instance, the back link applications previously mentioned will give a great deal of information, but it will ultimately be the skill of the specialist who interprets this data and puts the required fixes into action that will make or break a client's website.

SEO technology has come a long way since the early days of keyword stuffing the meta tags and throwing a bunch of nonsensical text at the bottom of a page. Both the technology itself and the skill of the SEO interpreting the data have advanced to the sophisticated level that we have today.