Research on signal-to-noise ratio of web pages

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Recently I saw the signal-to-noise ratio of the Web page mentioned in many pages, meaning: The ratio of the content of the text in the Web page to the content of the HTML tags generated by the text. I think it's a narrow understanding, because the search engine in the crawl process, will take into account a variety of factors, such as: The actual size of the Web page, for this issue I need to emphasize: although in many SEO works also mentioned, will be flash,css encapsulation methods, but in the actual web page crawl process, is not an important basis for this, because in all kinds of chains, still distinguish between such points, if it is not difficult to explain some Web pages in plain text to reflect the Web page and the key word density and the size of the same page in the search engine returned high results. And it's also reasonably strong. In some search results, The first page of a Web site is one that appears in text, and the second page is the home page of the station.

Another phenomenon is that if the text and links that appear on the page do not have a significant connection to the actual content, it will also reduce the overall signal-to-noise ratio of the Web page, this is in the actual process can be realized, the most real example is: In a news search, shun Mai technology of a news and Sohu news conflict, Release time difference in 5 minutes, in the second day of search results, the page unexpectedly ranked in the front of the Sohu,, shun Mai technology Pr=3,sohu site for 7, the new page should not have PR so, from the framework analysis, the overall is no big difference, So the only difference is that Sohu News page some text ads and a flash ad, which proves that the content of the page in the correlation rate and the rate of exclusive in the entire Web page Signal-to-noise ratio has a very important significance.

So the concept of the generalized Web page signal-to-noise ratio should be: The text in the Web page as well as the ratio of various factors (including pictures, FLSSH,CSS, etc.) and HTML tags content of the Web page.

My advice is: because when the Web page signal-to-noise ratio to do an important parameter indicators to plan the site, because any factor may lead to the failure of the SEO work, in order to avoid such risks, because when the correct planning of the entire site content and framework, a large number of pictures and the use of flash and the resulting encapsulation, Optimize HTML code ...