What does International Targeting reports do within Google Webmaster Tools? In a nutshell, It helps webmasters debug common issues with any implementation of href-lang. This markup will enable Google and other search engines to serve the corrct language or regional version of a site or page to the appropriate searcher. The unfortunate thing is that most webmasters will implement the annotations/markup incorrectly. WIth International Targeting reports, these issues will be able to be seen and fixed.
There are two common issues that the report will help identify with href-lang annotations.
1. Missing return links.
2. Incorrect href values.