The plugin adds Meta Title+Description+Keywords fields to the post/page. This is the mix of Simple Meta Tags and Meta Manager, because "Simple Me
While publishing a post/page, you can set: a) meta-description tag (if you leave that field empty, then the meta-description will use the first ~50 words of a post.) b) meta-keywords (if you leave it empty, then it wont be filled automatically) c) meta "TITLE" .
__Notes about ini_set: when using php header commands, such as ini_set or etc... there may be problems in the page's output's source code, as the header or title blocks may be double outputed. so, be adviced..