The administrative options page for the All in One SEO plugin
Like Home Description, the Home Keywords field controls a meta tag. Namely, it populates your meta keywords tag with descriptive keywords for your site. Make sure you list all your keywords as comma-separated values (that is, phones, blackberry, mobile, wireless, iPhone).
Selecting the Canonical URLs check box ensures that All in One SEO will add the rel = "canonical" attribute to URLs. While this is supposed to help search engines understand how to handle canonical URLs, it has been found to be largely ineffective. For more on the potential risks for using this feature, see the excellent write up at www.quickonlinetips.com/ archives/2 00 9/04/seo-wordpress-plugin-drops-google-pagerank/.
Selecting the Rewrite Titles check box ensures that no matter which page you find yourself on, the title tag will always be rewritten to make the most sense from an SEO standpoint. Post titles that are set when you create a new page or blog post will be used where applicable, and the home page title tag will be reoriented in a way that is most beneficial for search engine comprehension.
If you select the Canonical URLs check box to allow the All in One SEO plugin to rewrite title tags, the Format fields gives you the opportunity to set the order and preference for each type of page. Be especially careful in this area because "placeholder words" are used to represent key data points. By default, the following formats are used:
Post Title Format = %post_title% - %blog_title%
Page Title Format = %page_title% - %blog_title%
Category Title Format = %category_title% - %blog_title%
Archive Title Format = %date% - %blog_title%
Search Title Format = %search% - %blog_title%
Description Format = %description%
404 Title Format = Nothing Found for %request_words% Paged Format = Part %page%
In addition to the keywords that you set, you have the opportunity to append the categories a single post is in. Presumably, if you use categories for your blog post (as opposed to as a structural element that many people have begun to use), these keywords can be appended into the meta keywords field as well. This can help further define the context and relevancy to the search engines.
In most cases, the Dynamically Generate Keywords for Posts Page option is not required. For some setups, however, the normal flow of posts is on a separate page. This is often the case when a WordPress install is used as a content management system and the bulk of the layout more closely resembles a traditional site. The "blog" is often designated to a separate area of the site and uses a custom page template. For situations like this, the All in One SEO plugin provides the opportunity to dynamically populate the meta keywords tag on this page with the keywords you have chosen.
The All in One SEO plugin also provides three options for to eliminating certain pages from being indexed by the search engine. These options are useful in avoiding duplicate content penalties but can also be overkill. Therefore, it is completely optional to designate archives, tag archives, and category archives as "noindex" links. When the search engine spiders encounter these links, the content behind them will not be indexed.
You have the option of having the All in One SEO plugin automatically generate meta description tags for all non-home pages. Usually, these meta description tags are generated with the post excerpt, something the author can predefine or WordPress can automatically generate. In the event that the plugin cannot find an excerpt, selecting this option enables it to automatically create a description that fits the blog post.
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