Important factor for a search engine like Google.
Ideal Page Content for  Google
  1. Choosing a Search Term for  Google. 
- Decide on the search  term that is going to be the source of visitors to the page, e.g. “big blue  balloons”.
 
- This is referred to  as your keyword or keyword phrase.
 
- In Sept 2004 a  Google systems engineer stated that 50% of the 200 million search terms each  day, were unique in that nobody had searched for that phrase before. A  remarkable fact. Use your imagination when choosing your search  terms.
 
- Remember that each  page is a distinct information site for Google, and that you should only really  aim for one search term per page.
 
2. Page Title for Google.  
- If you are a  manufacturer of "big blue ballons", you might decide  that the page title for Google should be "Big Blue Balloons For Sale."
 
- However, if your  chosen keyword phrase, and the part you play in that keyword phrase, is not  clear, it is worthwhile giving considerable thought to the words to be  used.
 
3. Page Heading for  Google. 
- Start the page  content with a large heading that contains the search  term.
 
- Not only is this of  obvious value to a visitor, who is not yet sure that your page contains what  they are seeking, but also for Google.
 
4. Page Content for  Google. 
- Write the page with  lots of interesting information, and include your search term several times, but  don’t stuff the page with keywords.
 
5. Page Size for  Google. 
- Keep your home page  down to the absolute minimum in size. Definitely under 30k. 15k is better.  
 
- SEO pages. Aim for a  minimum of 300 words, and if you can find sufficient good information for 1,000  words or more even better.
 
- Under no  circumstances should a page be over 101k as Google will not even index the  remainder. 
 
6. Importance of a Site Map for  Google. 
- If you have a  complex site, it makes sense to give visitors a site  map.
 
- Regardless of the  complexity of your site, you are advised to provide a site map for Google. If  it’s good enough for Google, it’s good enough for the likes of you and  me.
 
7. "I have tried all  that, and am still nowhere to be found".
- The Google algorithm  is said to have over 100 factors, of which page content and links from other  pages are the most important. The mathematics involved is fairly mind blowing  for all but serious mathematicians. There are several links on the next page,  headed Google links, that give just a small  sample.
 
- As far as page  content is concerned there is a link that explains that, instead of simply  scanning for page-based text, Google technology analyses the full content of a  page and many other factors including the precise location of each  word.
 
The work to produce the ideal page for Google is  referred to as on page search engine optimisation.  These on page factors can be beaten by the off page factors for Google described  in links. Without links from good quality pages, your page will have difficulty  in being highly ranked for a competitive search  term.
CAUTIONARY NOTE:  Make sure that you understand the Google philosophy on the tricks that some  webmasters use to try to cheat, and that can result in being banned by  Google.
ADVISORY NOTE: Read  carefully the Google Webmaster guidelines.