The hreflang tag is used to:

1. Allow the search engines to detect which language is being used
2. Specify the location on a page to target users in a specific country
3. Allow Google to offer the autotranslate option to visitors in order to reach new visitors based on the selected languages
4. Provide search engines with alternate versions of a URL to allow them to serve the correct page to their users based on language

Correct Answer:
Specify the location on a page to target users in a specific country