When you create your web site, you mean for it to be exposed to as many people as possible, we call it generating web traffic to ones' site.
So, what you do is you fill your web pages with useful and informational content  and functions for your visitors to review.
However, no matter how ridiculous the thought may at first occur to you, your web pages have to be composed and filled with content so that they would not only satisfy your target visitors, but would 'please' search engine robots, called crawlers, too; because this is the main requirement for successful search engine optimization we are going to discuss in this article.
So, what is search engine optimization? I suppose there is no need to explain what search engines are.
By many web masters search engines are considered to be the best generators of website traffic.
They allow millions of people to find what they are looking for in the infinite sea of Internet.
Now, optimization for search engines means fitting your website to correspond with their rules, so their crawlers (automated computer programs, which visit sites and select the ones most fitting for search engine use) can include your website into their listings and give it certain online ranking.
These crawlers have very particular requirements for the websites they include in people's search results and when you optimize your site to meet those requirements, you greatly improve your chances for generating large and high quality traffic to your website.
Here are some major tips for search engine optimization: - if you want to get high in search results, you need to fix all the mistakes on your web pages, staring with their HTML code; - now, no doubt you have your site keywords all selected.
There is certain keyword density preferred by search engine crawlers.
It is considered best not to exceed 4-7 percents density in using keywords.
If you overdo things with keywords crawlers may take it for spamming and even ban your web site; - every page of your website has such crucial part as Title.
It is the part of the site, which you create rather for the search engines' sake, than for your visitors', because one of the major things crawlers do take into consideration is your website Title content.
Every Title for every page of your website has to be unique.
It can include up to 80 symbols and has to describe briefly but relevantly your web page content.
Great Titles can put you high in search results; - another important thing for search engine optimization is Description.
Here you may use sentences with your website keywords.
This description has to be in line with your pages content and be catchy, because it will be exposed in search results to show people the relevancy of your site content to their requests; - one last thing I want to mention is actually your site content.
No matter how you try to please crawlers by fitting your tags, titles, descriptions and keywords to search engine requirements, if your site content is not unique or is not updated regularly, you may fail to get high in search results.
As you see, if you go by certain rules, search engine optimization can produce great results in generating much traffic to your web site.
So, fitting your pages for humans to review, do not forget to fit them for pleasing robots as well.