Charset: For the html5 default charset value is UTF-8 and the latest encoding is ASCII and later charset encoding is ISO-8859-1.
Viewport: The meta viewport tag is an indispensable tag (together with Media Queries) if you are building a responsive website. However, you can technically set viewport meta tag for non-responsive web design all the same.
Description: Describe what you want to share in 160 words.
Subject: The subject of your, topic for this blog subject is “meta tag”.
Language: Define website language.
Keywords: Use full keywords for this page in search
Robots:The robots meta tag use fro instructs all search engine not to show the page in search results. The value of the name attribute (robots) specifies that the directive applies to all crawlers. To address a specific crawler, replace the robots value of the name attribute with the name of the crawler that you are addressing. Specific crawlers are also known as user-agents (a crawler uses its user-agent to request a page.) Google’s standard web crawler has the user-agent name Googlebot.
Revised:The “meta revised tag” is used to tell Search Engine Bots (Google, Yahoo!, Bing, etc.) the Last Modified Date and Time of any Web page in which you have made certain changes.
Abstract:The meta tag abstract can be used to indicate in just a very short sentence what the webpage is about. So every webpage of your website gets its own abstract-tag.
Topic:Topic of your blog for this blog topic “basic meta tag”.
designer: Website or blog designer name.
reply-to:Email address for contact information.
owner: Website owner name.
url: Webpage url
Pagename: This text same as page title.
Category: Page category.
Coverage: Specify country and otherwise take as worldwide.
distribution: 1. Global – indicates that your webpage is intended for everyone,
2. Local – intended for local distribution of your document,
3. IU – Internal Use, not intended for public distribution.
Revisit-after:By using this so called revisit-after meta tag you can tell the spider to come back to your website and index it again.
Subtitle:Subtitle of that page.
MobileOptimized: This use for defualt size for mobile view.
Date: Content publish date
Medium: Some of the sites primarily display videos that for content video and this page for medium blog
syndication-source: The tag will be used by both the site that syndicates its content, as well as the site that receives and publishes the syndicated content from another source.
original-source: The original-source meta tag can be used by publishers wanting to claim their article as the original version.
verify-v1: The verify-v1 option within your Meta Tags Module is a Google webmaster tools-specific meta tag used to verify ownership of a site in Google’s webmaster tools.
y_key: that’s used to verify a site with Yahoo Site Explorer – if you want to verify your site with them go to https://siteexplorer.search.yahoo.com/, add your site, and they’ll generate one of your very own