HTML tag picture Alt in optimization of cautious use

The image of deliberately flooded with a large number of ALT keyword text not only does not help the search engine rankings, but because there are alt keyword garbage (alt Text Spam) suspicion and influence ranking results

In web design, the attribute alt tag of a picture is used to describe a picture. ALT tags A number of keyword information in the search engine optimization has played a role, often used to increase the density of web pages, so in the alt to properly add keywords related to the topic of search engine optimization is considered a factor. However, the recent U.S. SEO research site Webmarketingnow and search Engine Academy According to long-term testing research that currently, the three major search engine Google, Yahoo! and MSN Search Engine ranking algorithm rules in the picture alt attribute of the text information as a way to determine the relevance of the content of the Web page is an effective factor.

The researchers say that in the past 6 months, we have found that intentionally flooded with a large number of ALT keyword text in the picture not only does not help the web search engine rankings, but it will have an ALT keyword spam (alt Text Spam) to affect the ranking results. It is clear that search engines are biting off the search experience that has corrupted users in order to elevate the rankings of search results for purely web sites.

One of Google's engineers made it clear: "The alt label content should be related to the picture content, the correct description of the picture content, so as to give users a good experience." The ALT tag content can indeed be indexed by spiders, but the weight level is further lowered in the ranking algorithm. ”

The original intention of the picture Alt attribute is that when the picture is not displayed correctly for some reason, the web visitor can judge the content of the picture through the attribute text, the original meaning is for the user to understand the information of the webpage correctly rather than for the search engine. Under normal circumstances alt attribute with one or two keywords has been able to explain the problem, if the search engine retrieval and set too much vocabulary is undoubtedly spam suspicion. Since many SEO applications of the ALT attribute deviate from its original meaning, the search engine no longer uses it as a factor in the relevance analysis of Web content.

Site optimization is fundamentally for users to better access information, rather than in order to get good rankings in search engines, get good results ranking is only the normal site optimization results of natural embodiment, rather than deliberate pursuit of the goal. Other elements of web design such as page title, meta tag content and Web page subject content should follow the user-oriented principles, the image of the Alt attribute description should also return to the source: concise description of the picture content. Whether the search engine ranking algorithm considers the information in the ALT attribute, it is also necessary to consider setting the picture's ALT attribute description correctly from the user's point of view.

Therefore, the policy here also reminds us again, not for ranking and optimization, but should be for the user and optimization, to be able to truly help users to better understand the content of the site information for the purpose, ranking just these methods after the natural embodiment.