Google Drops Support For Noarchive Meta Tag Directive

With Google removing the cache operator from its search service, Google has stopped supporting the noarchive directive in Google Search. The directive, the noarchive meta tag, would tell Google not to keep a cache copy of your page. Since Google doesn’t have a cache anymore, there is no need for Google to support this directive.

Understanding Keyword Competition in SEO and PPC

Google Tests Sponsored Ad Label Variations