In this episode of Ask Google Webmasters, John Mueller goes over how Google search engine approaches user generated content on websites, how to block this content from being indexed (if needed), and how to flag links within user-generated content. The question was submitted by @amitkrseo. Thank you!
Evolving “nofollow” – new ways to identify the nature of links → https://goo.gle/2maKF4D
Block search indexing with ‘noindex’ → https://goo.gle/35Gdpon
Robots meta tag specifications → https://goo.gle/2kE60Tr
Qualify your outbound links to Google → https://goo.gle/2LY13Qz
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Google Search Central on Twitter → https://goo.gle/3f4Z0a8
Watch more AskGooglebot episodes → https://goo.gle/2OjWcvS
Subscribe to the Google Search Central Channel → https://goo.gle/SearchCentral