Key words analysis difficult to analysis ability

Key words analysis difficult to analysis ability, SEO run through the website of the key word choice, the layout of the page, internal and external links, website operation, website promotion DuoGe etc. Here are some key words difficult extent method of determining, together to learn.
First of all the attention to key words search results, the number of this like a important reference index, general, and search results less than 500000: belong to the competition of smaller; Search results 30-1 million: to belong to medium slants little; 100-3 million: search results to belong to medium; Search results 300 5 million: belong to above-average; More than 5 million search results: belong to difficult words. And domain names level, the numerical rivals number reaction to the competition sites, the overall strength of search results appear in the domain name level the greater the number that competitors, optimization of the word, the more competitive the site as the difficulty of optimization.
(wow gold) http://www.wow77.com (wow items)
(buy wow gold) http://www.wowgold-use.com (wow gold)
(wow gold) http://www.wow-gold-team.com (buy wow gold)
(wow gold) http://www.cheapergold.co.uk (buy wow gold)
(diablo 3 powerleveling) http://www.myd3gold.com (diablo 3 gold)
(17rice)http://www.17rice.com