There are so many SEO plugins for WordPress, some much better than others of course, some avoid all that much but here are 3 great plugins that I have used that would be incredibly useful on any WordPress Site.

seo ultimate plugin

SEO Ultimate- I think this great plugin deserves more recognition than it's gotten up till now. I have never seen a plugin with your a vast selection of features, this may exactly what All-in-one SEO, also throws in the same functionality within SEO Smart Links along with a number of other plugins it's essentially the Swiss army knife of WordPress plugins. A few examples of their capabilities include; code inserter (to be used with adding Google Analytics, AdSense section targeting etc) Webmaster verification assistant, Link Mask Generator, Robots.txt editor and you can even export your SEO Ultimate settings to some file so you can import later or use on another blog if you want to, together with support for importing post meta data from the All-in-one SEO plugin - and there's more, simply a must have for the blog.

SEO friendly images - It appears as though a lot of people will focus more on the off-page SEO rather than on page, which itself plays an enormous roll in drawing traffic to your website from search engines. In the of the on-page factors, image ALT & TITLE tags appears to be probably the most underused. This great plugin will automatically update all images with ALT and TITLE tags, the plugin may even add these tags to images that do not ask them to according to the options you have selected.

seo plugin

Google XML Sitemaps - This is a very useful Wordpress tool, it will create an XML sitemap for your site that will allow it to be indexed better through the major search engines like google including Google, Bing, Yahoo and Ask.com. Search engines crawlers can use it to see the entire structure of your site and notify them whenever any new content is added.

XML sitemaps are extremely useful because they allow search engines like google to index pages that are not associated with your website that you simply wish to be indexed. It tells them the final modified date of pages, how often a page is updated therefore the crawlers know when you should return for new content or updated content and it'll allow you to indicate the priority of particular pages within your site.