Meta format-detection
2,531,226 websites

Meta format-detection is free to use

http://www.html-5.com/metatags/format-detection-meta-tag.html

When running in a browser on a mobile phone, "format-detection" meta tag determines whether or not telephone numbers in the HTML content will appear as hypertext links. The user can click a link with a telephone number to initiate a phone c...

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Meta Keywords
7,523,563 websites

Meta Keywords is free to use

http://www.wordstream.com/meta-keyword

Meta Keywords are a specific type of meta tag that appear in the HTML code of a Web page and help tell search engines what the topic of the page is.

Market Share by Top Websites

1 Meta Keywords is leading in Top 10K Sites, Top 100K Sites, Top 1M Sites and The Entire Web.

2 In terms of market share, Meta format-detection is clearly lagging behind, losing to Meta Keywords in all segments.

Websites Categories

1 Meta Keywords has better usage coverage in more websites categories. Including Computers Electronics & Technology, Arts & Entertainment, Science & Education, Games and 20 other categories.

2 Meta format-detection hasn't got a lead over Meta Keywords in any websites category.

Geography

1 Meta Keywords is leading in most countries, including United States, China, Japan, Russia and 161 other countries.

2 Meta format-detection is leading in South Korea.