POSITIVE ON-Page SEO Google Ranking Factors

In one word, valid your (x)html markup and css code, it boost the ranking great in SERP .

 

Google doesn't give a darn about HTML validation.
Google's HTML does not validate, and never has.
They don't even do required step #1 - make a "doc type" declaration.
This has been discussed many times.
Here is just one mention -
http://www.shmula.com/313/html-validation-errors-on-google-homepage
Check it out for yourself, if you are not convinced.
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what you mean with a great boost?

 

I found it on google when i search for "google ranking factors 2009"

 

Good stuff. Going to analyze my site as I look through this list again. Thanks!

 

should read - "I found it on google when i search for "google ranking factors 2009, and then I copied it, and presented it as my own."

Can you spell ATTRIBUTION? Do you even know what it means? I guess not.

Thanks, buddy.
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On-Page Optimization - it deals with the proper use of title tags, meta tags, alt tags (use when describing images), description, sitemap, h1/h2 tags and keywords.

 

You list of onsite seo tips is very useful.

 

Using your targeted keywords on the title is the best thing to do.