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Google +1 Button is leading in Top 10K Sites, Top 100K Sites, Top 1M Sites and The Entire Web.
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In terms of market share, Instagram Feed for WordPress is clearly lagging behind, losing to Google +1 Button in all segments.
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Google +1 Button has better usage coverage in more websites categories. Including Computers Electronics & Technology, Arts & Entertainment, Science & Education, Travel & Tourism and 19 other categories.
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Instagram Feed for WordPress is leading in Food & Drink.
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Google +1 Button is leading in most countries, including Japan, France, Italy, Russia and 115 other countries.
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Instagram Feed for WordPress is leading in United States, United Kingdom, Australia, Canada and 43 other countries.