SEO means Search Engine Optimization. It means that, do something search engine related work, which make a website front/first page on a search engine like google, yahoo. In SEO, search engibe related work is doing here.
It is professional work in freelancing market place. All the website owner want to see his site on first page on search result. And this is main target of a website. A person build a website to publishing or sharing something, if the visitor get the content and being helpful then the website owner is successful in his work. All the content creator need visitor, which is called traffic. And here SEO is helped a lot. It is so important for website owner.
The demand of SEO is increased day by day. Daily huge number of the website are add onto online. And with it day by day the website owner need SEO expert. By this day by day the importance of SEO is increased.
So if you learn SEO, it will be good for your future life. You can open a freelancer account on various freelancing market place. And get huge number of order of work by knowing SEO.
By the other hand, you can work on local place. You can start a IT farm to provide SEO service on you are. This way you can make your life successful.