META Name Author
In this article the complete description about META Name Author.
To give credit to the person of company that made your website? You use the so called AUTHOR tag. There are also Content Management Systems (CMS) who will put the name of the actual person editing the page. If used like this, it is easy to find the right person who is responsible for a webpage.
This meta tag has no influence on your search engine ranking.
Description
You may add this author tag to all of your webpages, so not only in the first index page. Make sure that on every page relevant meta tags are added.