SEO stands for search engine optimization. Search engine optimization is the process of creating web pages that are purposefully designed to be friendly to and easily understood by the major internet search engines. The major search engines that you should pay attention to are Google.com, Yahoo.com and Bing.com.
SEO is an ever evolving science. The major search engines like Google are constantly changing the way their computers look at websites. They are constantly trying to find ways of producing the best possible page of results whenever a visitor types in a question or phrase.
At the same time that the search engines are trying to improve their results, there are millions of websites trying to tweak and edit their pages so that they can achieve those higher results. The fact of the matter is that there are billions of dollars to be made by companies who rank well for the right words and phrases.
In addition to the legit businesses out there competing for top rankings, there are also millions of pages of spam that are trying to rank high for those terms. The battle between the search engines and the spam is a never ending one. The battle between legitimate businesses and spam sites is also an endless one. They are constantly trying to outdo each other.
The big websites like Google and Yahoo have gotten much better at filtering spam from their search results. In doing so, they have also made it harder for older somewhat neglected but legitimate business websites to rank well. This happens because the same tactics that get a business website to rank well also work well for the spammers.
This constant battle and constant changing has created an industry where professional SEO experts help legitimate businesses compete for higher rankings in the search engines. In this day and age, pretty much any legitimate business is going to have to invest in reworking their website using up to date SEO protocols. If they fail to do this, they are probably ranking a lot lower than they would otherwise be.
As the population continues to shift to an internet savvy one, businesses are realizing that they have to take advantage of their internet property to its fullest potential. SEO is an art form and science that will be around for many years to come. There is tremendous value in the field for companies who are good at it. There will be companies willing to pay for good results so long as people are looking for answers online.