This is a good question @revote !

For our community, we have the meta description in place in the phrases tool but not in the SEO&SOCIAL. 

However the descriptions are in place both on Google and social media. 

We have both meta descriptions, but with (totally) different texts

Which one is showing (and where)? 

Actually, there are 3 different metatags in the Phrases:

I tested and they are displayed like this:

Google

Top row: Key: community name AND Key: Ask your question

Second row: Text from Branding → SEO & SOCIAL

This second row text is same than our Key: On the {forum} you can ask for help or participate in discussions.

Social media

Key: community.name

Hmm.

Well this is odd, I googled your community and for me the meta description is entirely missing and it comes from one of the topics.

I found another topic about this but it seems to come to another conclusion 

Yeah, true. Meta description can´t be found from the first view, when viewing the search results. It can be found from the link “More results from...”.

I Googled your community and it seems that you have same behaviour.

Thanks, that was good link.

Yeah, compared with this:

Our 1 & 2 are the other way around. Your community is just like above. Hmm. Weird.

Edit: I create a ticket and ask why meta description isnt visible in the first view, and why our 1 & 2 are other way around.

I tested more, I searched Gainsight community. Their meta description can be seen in the first view and they have 1 & 2 just like we have.