Interpretation: Alt attribute value to search engine still valid?

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See a lot on the internet to discuss the image alt attribute value optimization for the search engine has no use for the topic, because the original set ALT attribute value is because the search engine can not effectively identify the image set, not for the user experience, if the Alt attribute value is no longer valid, then we can not set the value of Alt Can save a lot of time for editing and development. Let's use the example below to verify that the ALT attribute value is still valid:

First of all, through the simulation search engine spiders to verify, the following through Huaqiang Electronic net home page of a picture for example.

The above is a case found on the Internet, alt attribute value is "Huaqiang North Electronic market price index Week trend", the source code of this page only such a word, through the search engine simulation crawl show, do not have this keyword, the internet discussion alt attribute value to search engine optimization has no use is true? The author also produced a doubt, but, or some disagree, after all, search engine can not effectively identify picture information (this is only the author of the experience of the argument, really reached the point, only the search engine internal engineers know). And this is just a simulation tool, I take this mentality on the Internet to find there are search engines to crawl the example. Kung Fu not negative, finally I found.

First, confirm single page is included

Second, confirm the Alt attribute value "bedroom _1880x1032 click Browse Next: Kitchen" is the only key word for this page

Third, through Baidu search "bedroom _1880x1032 Click to browse Next: Kitchen" only keyword appears match result

Four, Google also appears to match the results

Through the above examples, we can draw the following conclusions:

1. At present, Baidu and Google or through the ALT attribute value to determine the type of picture, picture alt attribute value to search engine optimization or continue to have effect;

2. Search for the only key words, Baidu appeared a lot of results, the results ranked fourth, Google only three information, and ranked first, which proves that Google more than Baidu focus on the relevance of search results;

3. We should according to the picture needs to express the information to give the picture to the Alt attribute assignment value, achieves the search engine optimization;

4. As for the title attribute has no effect, still need everyone to verify!

Thank you (hqew.com) webmaster feeds!