Although there are zillions of plugins that can add all sorts functions to WordPress, it’s best not to use too many, as each one uses up server resources and can break your blog if the developer does not keep it up to date.
Some of the extensions we mention here - such Google Webmaster Tools and Analytics are not strictly-speaking plugins - but they are extensions that we always add to a site we work on.
Here’s a shortish list:
XML Sitemap - to assist search engines
Google Webmaster Tools - to see how Google views site
Google Analytics - to give in-depth statistics about visitors
Cache - to speed up page views and reduce server load
Akismet -defense against comment spam (non-commercial version)
Ability for you to embed picture galleries, audio or video on your site, if required.
One Comment
finally I found those plugin here, thanks for your info