Education Program:Mahidol University International College/ICCH224 (2017-18T2) [[1]]
The Thanks notification offers a way to give positive feedback on Wikipedia. This feature allows editors to send a 'Thank you' notification to users who make useful edits – by clicking a small 'thank' link on their history page or diff page.
The "(thank)" link is only displayed when both the viewer and editor are registered users. It can be used to thank the editor.