Easy to manage
It is a simple module. It makes site verifications easy. Site owners don't need FTP tools to upload verification files or to edit template files to add meta tags.
Saves the hassle of doing it manually
Great module. Works flawlessly and has most of the Search engines covered. Additionally you have the ability to add custom Search engine verifications. Integrates well with the XML sitemap module http://drupal.org/project/xmlsitemap which happens to be maintained by the same person (Dave Reid). Could possibly do with a bit more documentation or links to documentation.
One stop shop
easy addition for adding search engine verification for different search services in one spot. lacks documentation which I assume is due to the fact this is beta. nice module that works well with meta tags (nodewords).