What does "Have you tried the 
button?" even mean?
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There's a button underneath each post which uses the emoji as its icon. You can press that button to indicate that you "like" a post, reducing the number of replies which contain little new content.
The question in your title may be more appropriate for https://meta.discourse.org/, which is a support forum for the Discourse forum software that users.r-l.o uses. 
1 Like