Dear Linh, the "changeset coment" field is there so that other (human) users of OpenStreetMap can get an idea of what your edit was about. 

Your frequently used changeset comment "#hotosm-project-27430 #CanCross #CRC #MissingMaps #NLWildfires" does not say anything about your edit. I can see (after some clicking and reasoning) that you have refined a building that someone else had mapped a day ago; but none of your changeset hashtags tells me that.

Please put any hashtags in the "hashtags" field, and use the changeset comment to describe the edit (for example in this case: "refine buildings" or something like that). 

Thank you!