Recently, I have noticed something strange. It turns out that some WordPress Sites are not being indexed by search engines. This applies only to recently launched websites running the latest stable WordPress release – 3.4.2.
As it turns out, WordPress 3.4.2, by default, asks search engines not to index your website. To change this, log in to the WordPress admin area, go to Settings -> Privacy, select “Allow search engines to index this site” and click the Save Changes button. After this, your website will be visible to search engines.
Again, this concerns only websites running the most recent WordPress version – 3.4.2. If you have updated from an older version, you will not have this problem, since the “Allow search engines to index this site” option is enabled by default in the previous WordPress versions.