But note that I don’t think those resources are primarily focused on communicating about EA/​GWWC onsocial media specifically.
(I also made a comment on an EA Hub google doc to suggest that it could be worth linking to this question, or alexrjl’s answer, somewhere on their site.)
I think this is a good question, and I like alexrjl’s answers and the other comments there.
Here are two pages with links to a variety of additional resources which you or other readers might find useful:
https://​​resources.eahub.org/​​learn/​​communicate-ea/​​
https://​​www.givingwhatwecan.org/​​get-involved/​​share-our-ideas/​​
But note that I don’t think those resources are primarily focused on communicating about EA/​GWWC on social media specifically.
(I also made a comment on an EA Hub google doc to suggest that it could be worth linking to this question, or alexrjl’s answer, somewhere on their site.)