Engineering NoFollow Open Source URL 
Adam Sherk
OCTOBER 14, 2015
The open source nature of AMP is a plus but I’m not a fan of having to create separate URLs. The use of sponsored content and native advertising also continues to increase as publishers look for additional sources of revenue. So make sure to get it right. User Actions and Engagement Signals.
Ari Herzog
MARCH 3, 2011
The blog platform, as an open source community, is collectively shared by anyone and everyone who contribute code and provide feedback about what works and what needs improvement. When a search engine robot visits this blog and wants to know how different posts and pages are interconnected, a plugin creates that sitemap.
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