These were never formally announced to the Discussions forum, so let's fix that up. The timing is convenient, because Wookieepedia has a new Twitter account as of today.
This was announced by administrator @Supreme Emperor on the wiki's internal Senate Hall forum, where formal wiki business is handled.
The other accounts include Facebook and Instagram, and the wiki also has a Discord server for users to discuss the site.
All the social media accounts and social outlets can be found on Wookieepedia's welcome page.
Hopefully this doesn't read too much like an ad, because these public connections really do strengthen community awareness for all users. Do check them out!