What do the red, yellow, and green dots on the profile thumbnail mean?

Hello,

Those little indications mean the users status on the website.
  • Green means the user is currently online (or has been active within the last 20 minutes). 
  • Yellow means they’ve been online in the last 24 hours. 
  • Red (or grey on the app) means they haven’t been online in over 24 hours. 
Hope this helps clarify,

The Grokio Team  

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