What does sign in with google/facebook mean?

Hello wilders!

I did some basic research about this sign in with google+/facebook/openid but I'm still not sure what's the catch?

I tried to make an openid but it says I already have an openid if I have a google account. Then I wonder, if I don't want other services to have access to my gmail account or google profile, can I still choose sign in with google?

Is there a difference between signing with google and facebook? It seems facebook account is not an openid account?

This is utterly confusing to me...

 

Does this link help: http://thenextweb.com/socialmedia/2...th-and-openid-the-differences-and-the-future/ ?

 

Thanks Brian. It clears something up for me, the article is a little old though.

 

You're welcome .

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