Most bloggers use SEO techniques such as using a robots.txt file, nofollow links and AdSense section targeting to drive or block the attention of the search engine index from the blog of unnecessary discretion her. In early May 2007, Yahoo announced an additional card on this list with the introduction of robots - nocontent.

This last attribute allows webmasters and bloggers to mark areas of a site they consider the contents are relevant to the content or subject of the article. All you need do is add class = "robots-nocontent" on Yahoo where you do not want to read the content.

<div class="robots-nocontent"> This is the site's navigation menu and is usually located on all pages. It contains many words and terms not related to the site </ div>
<span class="robots-nocontent"> This is the site's header, it appears on all pages of the site and it is not related to any particular page </ span>
<div class="robots-nocontent"> This is good section where the ad appears on the page. The ad from showing to be completely irrelevant to the content of the page </ div>

This card is for the signal content in Yahoo said it should not be read and should not be used for classification. It helps Yahoo to read exactly the part you want to use the article in their ranking algorithms.

The benefits of robots-tag nocontent this?

Towards you: read the directions for Yahoo content you want, it will help your site indexed more accurately. And so you get the opportunity to search relevant to your site will be more.

On the Yahoo: it helps to read what Yahoo is not necessary should not be indexed more accurately, and therefore not read unnecessary information should be less bandwidth (bandwidth) more. The final result is that they give out the search results more precise. By using this card, including benefits both you and Yahoo.

Please note that your card with Yahoo's robots-nocontent not been widely adopted in other search engines, especially Google, so it only works to help increase rankings on Yahoo but not now effects on other search engines.

However, the use of this card does not have any harmful effects on other search engines, Moreover, Yahoo is the second largest search engine on the Internet today. Therefore, SEO standpoint, this is still a job to do.