Facebook Page Administration
500,743 websites

Facebook Page Administration is free to use

http://developers.facebook.com/docs/opengraph

Identifies administrators for a page which will be able publish data to your wall if you like any content within this page.

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Meta Robot
11,069,238 websites

Meta Robot is free to use

https://developers.google.com/webmasters/control-crawl-index/docs/robots_meta_tag?hl=en

This page contains a meta robots tag which tells search engines and robots to index or not index the page.

Market Share by Top Websites

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

2 In terms of market share, Facebook Page Administration is clearly lagging behind, losing to Meta Robot in all segments.

Websites Categories

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

2 Facebook Page Administration hasn't got a lead over Meta Robot in any websites category.

Geography

1 Meta Robot is leading in most countries, including United States, Japan, Germany, United Kingdom and 162 other countries.

2 Facebook Page Administration hasn't got a lead over Meta Robot in any country.