1. All in One SEO Pack

Optimizes your WordPress blog for Search Engines (Search Engine Optimization).

Here is a list of the most important on-page ranking factors and how they are addressed by this WordPress SEO plugin. You might want to visit Options – All in One SEO to tweak the default options.

Titles

The text that you see in your browser’s window bar is the most important thing *on* your page. Make sure your titles are getting rewritten and the important stuff (your post titles) always come before anything else. You can leave a few words from your blog title to do some branding but don’t overdo. If your post titles don’t contain your most precious phrases you want to rank for then tweak them. Leave the post titles as it is but change the meta title.

Descriptions

Once your pages rank in search engines your description (aside of course from your title) makes a potential visitor want to click through, or not. It’s mta descriptions, believed dead by many people, that decide over your site’s fate. If you don’t want to invest the time and write a description for every post at least let them be auto-generated. This vastly better than the usual “Share This … Posted on … under …” description that is often used. The preferred source for your post description is your post excerpt. Use this when you want to tweak your description.

Keywords

All in One SEO Pack can generate them from your categories (this was the old way of tagging your posts in wordpress) or from Ultimate Tag Warrior or, starting with WordPress 2.3, the built-in tagging system. Using your categories is optional, the rest is auto-detected and used if there. WP 2.3.x tags are the preferred keyword source.

Duplicate Content

You can have “noindex” and the like generated for archive-, category- and tag pages if you seem to have trouble with duplicate content.


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2. WordPress SEO by Yoast

WordPress SEO by Yoast covers the SEO fundamentals. Once installed, you can analyze a page for a focus keyword to check if you are using your keyword in the right places. The plug-in will also automatically generate a snippet preview of how your site will appear on Google. Other important features include control over the breadcrumb path that appears on a page, permalink cleanup, XML sitemap creation and robots meta configuration.

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3. SEO Ultimate

This all-in-one SEO plugin gives you control over title tags, noindex, meta tags, slugs, canonical, autolinks, 404 errors, rich snippets, and more.

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4.Platinum SEO Pack

Platinum SEO Plugin offers Complete onsite SEO solution for your WordPress blog.Platinum SEO Plugin offers all the functionalities of All In One SEO

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