You can promote your work on any social media site as long as you are following their rules and not being spammy.
Keep in mind that when you promote your article that you share should be relevant to share on the specific venue. For example, don’t share your post on a food recipe on a Facebook Group that is about social media.
You shouldn’t share your single post repeatedly over and over again. That’s spammy.
You can share links to your work in your own blog.
You can not share your work in exchange group – i.e. groups where you are required to visit the article/comment/etc. in exchange for sharing your post.
You can not share via email lists.
If you’re not sure if your promotion is ok then leave a comment here.