All in one SEO, this plugin creates meta tags for each pages you will have in your wordpress. This is a good plugin because if you will have this meta tags, then search engine robots will easily crawl you site.
Here are few important plugin that are require for your wordpress blog: - All in one seo pack - sexy bookmark - yet another relevant blogpost - Digg Digg (this will put social media sharing button in your blog content) Apart from there, there are various other important plugin available online. I can suggest more if you can stat your exact requirement.
wordpress have wide range of plugin's so it depend on you which type of plugin you want to use for your website. analytic, adword, gest blogger, bookmarking, share this, comment rating, post rating and more
Now a days you can get several free wordpress plugins online. Some of the best plugins which can help you optimize your website running on wordpress are as follows: 1) Seo Title tag 2) Smart Bread Crumb 3) Robots Meta Tag Plugin 4) Social Sharing Plugin for Wordpress You can directly search these keywords on google search for desired results.