WordPress SEO
WordPress in general is very friendly to search engines.
You need to make sure that you are using the correct plugins and setting to make sure will recive good rating from the search engines.
It is very important to use the permalinks settings correctly:
Permalinks
I am using the following configuration:
Permalinks settings
/%category%/%postname%/
This configuration is highly recommended.
WordPress SEO Plugins
There are many SEO plugins for wordpress, some of them are useful, some of them are not, some of them can even be harmful.
Here is two of the most popular WP SEO plugins:
1) All in one SEO pack
All in one SEO
This is a great plugin, many options works just out of the box, but some other should be configured.
Overall useful, powerful and yet not too complicated plugin.
For more information please refer to WordPress installation page or plugin homepage.
2) HeadSpace SEO plugin
Headspace plugin
Headspace plugin has more options then the SEO all in one plugin but is little more complicated.