SEO is the art of extracting the Google robots to scan, spiders, sometimes called seem to place higher in the rankings in the first two pages of search results. There are several ways to do this, but the best known is the use keywords.
Google search engines are not fooled by spam tactics

In an effort to deceive and attract coveted web mining, spiders, many SEO writers make the mistake of insisting on charging at the keyword. With the same word more than 8 500 words or less in one usually results in something that sounds stupid readers and frightens the robot spider creepy, especially if you also have a maximum of four keywords from the other overloaded with the same frequency. However, many sections of sites with more than 300 words and 30 of them have obvious keywords. This is not good SEO, or good deed.
This tactic worked until people started to abuse the privilege, but Google their robots reprogrammed to recognize these fraudulent emails. Search engine robots are now loaded with the keyword and get the results automatically as spam.
Simple is better

The best web content is simply a good content writing, keyword be used up to seven times per page, and two or three keywords that are used less than three rooms. These are the maximum and if you can not not words for the right to speak three or four times is sufficient to use sound. It is also important in the use of the word. Titles and subtitles are more influential than the first sentence and last sentence.
Another important factor is the simplification of the site. Pages long, do not do as well as short, average 500 words a page with 300 words quite optimal. Over 1000 words and the player and bots are lost. In the name of simplification, avoidance of Java and Flash. to confuse these types of robot programs, and the page takes too long to load. Simple is better. It is good to have some examples per page. Tables should titles or captions, the article is here.
Keep content relevant

It’s for authors, tough love long walks metaphors, but it is not lost for the development of key space on analogies to other matters of importance. It is for some to stay on the subject difficult, but walking does not pay, SEO, or content when considering only about 500 words to make a point.
Design is always important

Of course, design problems is also important, but more to the reader that the principles of SEO. Keep a good contrast between text and background, and the guy is a face hard enough to be visible on the bottom.
Another point is about HTML. HTML is not interfering with the robots of search engines, but some say he does too. Keep simple HTML, or better yet, use blogs that are already established and preformatted.
URL
The URL should, if possible, take into account the main purpose of the page somehow. Avoid variety of topics on a website. It is better to have a number of sites that put everything under the sun under the same title.
Google says do not write articles to attract search engines

Of course people do, but their goal is to prevent your items are not natural just to win visitors from Google. One can of keywords with no word keyword. It’s really hard to write such articles to read even more difficult, and new educational robot spider does not like anyway. So it is better to simply and logically to post content on the subject and to avoid keyword spamming.