addedValues Plugin

As META in

If you choose Yes for this property, the variable value will be included as META tags in the HEAD element of your Manila web pages. For example, a message variable called keywords for this story with value 'addedvalues plugin meta tags' , might create a meta tag like this

<meta name="keywords" content="addedvalues plugin meta tags">

Meta tags are or were, of interest to search engines and other content classification robots, but their use was abused by websites attempting to better their search engine rankings, so they are not as important as they were. This site does not use them.