Sometime back in our post, we talked about 10 Popular WordPress Plug-ins for bloggers. And, in this post we would talk specifically about the most valuable SEO plug ins for WordPress that would help blog writers optimize their content on the search engines.

Here is a list of 20 popular SEO plug-ins for WordPress

All in one SEO Pack

Easy to use and compatible with most WordPress plug-ins, this plug-in automatically generates Meta tags and optimizes your titles for search engines, helping you in avoiding duplicate content. All in one SEO pack also enables you to manually include Meta tags (title, description and keywords) for each page and post as per your requirements.

TGFI.net SEO WordPress Plug-in

This plug-in is a modified version of the all-in-one SEO Pack. One of the unique features of this plug-in is that it is directed at people who use WordPress as a CMS. This plug-in can auto generate titles, descriptions and keywords, and is helpful in avoiding duplicate content.

Google XML Sitemaps

This plug-in helps you generate an XML sitemap supported by Google, Bing, Yahoo and Ask. Sitemaps make it easier for crawlers to see the complete structure of your web site and thus the crawlers are able to retrieve your content more efficiently. Google XML sitemaps also notifies all major search engines every time you create a new post.

HeadSpace2

This plug-in helps in managing meta-data together with handling a wide range of SEO tasks. HeadSpace2 enables you to tag your posts and create custom titles and descriptions thus helping you improve your page ranking and relevance on search engines. HeadSpace2 is available in multiple languages.

Nofollow Case by Case

This plug-in helps you in selectively applying or removing “nofollow” attributes to comment links, comment author links, pingbacks and trackbacks. It also allows you to open the comment links in a new window.

SEO Slugs

Slugs are defined as long filenames that are assigned to your posts. For instance, http://yourblog.com/25 ways of improving your website’s performance. This plug- helps you remove common words, such as ‘a’, ‘the’,’in’,’what’,’you’ and others from the post slug to make it more Search Engine friendly.

SEO Post Links

This plug-in works in a similar as SEO slugs. The plug-in shortens the post slug, enabling it to retain only the necessary keywords in order to make it Search Engine friendly.

Automatic SEO links

This plug-in helps in automatic linking. All you have to do is choose a word or a phrase for automatic linking and this plug-in will replace all matches that it will find in your post. This plug-in will also allow you to set the anchor text, title, target and rel. If there are repeated words, only the first matched word in the post will be replaced.

SEO Smart links

This plug-in automatically links keywords and phrases on your blog with corresponding posts, pages, categories or tags on your blog.

SEO Title Tag

This plug-in makes it relatively easy for you to optimize the title tags across your WordPress blog. SEO Title Tag allows you to override a page’s title tag with a custom one, mass edit title tags, get title tags for 404 error pages and much more.

WP Backlinks

WP Backlinks helps in link exchange. As soon as you install this plug-in, it will put a small form on the sidebar of your blog that will allow webmasters and other bloggers to quickly submit a link for link exchange. The plug-in will also spider the webmaster’s site for gaining a reciprocal link. The plug-in also gives the option of displaying different links on different pages.

404 SEO plug-in

This plug-in gives you a catchy, customized ‘Page Not Found(404)’ error message and automatically displays links to relevant pages on your site.

Redirection

This plug-in helps you in managing 301 redirections, keeping track of 404 errors and also correcting them. Redirection plug-in also enables you to keep a track over your redirects by giving you full logs of all redirected URLs and also RSS feed for 404 errors. This plug-in automatically adds a redirection as soon as a post’s URL changes.

Robots Meta

This plug-in allows you to add meta tags to individual posts and pages, prevent indexing of your comments, login and admin pages.

AddToAny

This plug-in enables your readers to share, save, email and bookmark your posts and pages.

Simple Submit SEO/Social Bookmarking Plug-in

This plug-in adds submission links for Digg, Delicious, Buzz, and Stumble to pages and posts. It allows you to choose whether to display it on home page, post page, all pages etc.

AntiSocial

This plug-in allows your readers to submit your posts to Digg, Reddit, Del.Icio.Us, StumbleUpon and other social bookmarking sites.

SEO Friendly Images

This plug-in assist you in making your images SEO friendly. The plug-in updates all images with a proper ALT and TITLE. ALT is the description for your image and TITLE is the tooltip text displayed when the mouse is over the image. Both these attributes are important components of SEO.

Sitemap Generator

This plug-in helps in generating a highly customizable sitemap for your blog. Thus, you can choose what to show and what not.

Google Analytics for WordPress

Google Analytics is one of the best analytics software available. It helps you keep a track your stats.

Hope these tools will help you increase the search engine visibility of your blog. Please share with us your suggestions and feedback.