charset attribute in the <meta> element?http-equiv attribute in the <meta> element function?refresh attribute in the <meta> element affect page behavior?itemprop attribute used in the <meta> element?x-ua-compatible value in the http-equiv attribute affect browser compatibility?default-style value in the http-equiv attribute?meta elements to be processed early in a document?application-name metadata in a web page?referrer metadata control HTTP headers?theme-color metadata in HTML?color-scheme metadata affect document rendering?viewport metadata?author metadata in an HTML document?description metadata influence search engine results?generator metadata in a web page?keywords metadata in an HTML document?robots metadata affect web crawling and indexing?googlebot metadata differ from robots?publisher metadata in a web page?creator metadata in an HTML document?noindex value in the robots metadata affect a web page?nofollow value in the robots metadata?noarchive value in the robots metadata function?nosnippet value play in the robots metadata?