It is generally a pointer that the above post or text is correct, or that whoever put that hand on somebody’s post agrees with said post.
Myself, I usually use it to indicate the technical correctness of somebody’s advice. 
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I don’t know the skill level of your friend so I don’t know why he ditched Manjaro. Nov. 1st marks my first whole month of using Manjaro.
I appreciate that Manjaro is faster than Windows and offers a lot more customization and security.
Until I can figure out how to make a virtual machine for Windows through Manjaro I’ll be missing some very beloved things that I’d ordinarily do with Windows. Namely Photoshop and gaming.
Within the first week of using Manjaro, I was so jarred 
that I wanted nothing more than to reinstall Windows but my whole principle behind installing Manjaro was and is to learn Linux and maybe break some cycles I had in my life with Windows which was gaming too much and not being very productive.
Maybe if your friend reads this he’ll reconsider. I’ve been a Windows user for over 10 years so switching out to Linux has been, as I said, jarring but EXCITING.
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