Are "polite" comments discouraged?
13484
Is it acceptable to write a thank you in a comment?
140262
Is it appropriate to remove excessive commenting from code?
86202
What makes a good/valid +1 comment?
1888
Best way to obtain clarifying information when reputation doesn't allow comments?
43732
Starting a Question with "Why Not . . ." Inappropriate?
123416
How am I supposed to ask questions if I don't have enough reputation to comment?
37700
How can I ask for clarification on a question I'd like to answer if I can't add comments?
144201
Can I place  in a comment?
133639
Is either "can" or "could" more polite?
14564
Formulating a negatively-expressed question
42307
Why isn't providing feedback mandatory on downvotes, and why are ideas suggesting such negatively received?
80007
Drop "not constructive", combine "noisy", reword "rude" and "other" comment flags
108648
Can I "tip" someone who left a good comment on my answer?
132272
Should a "thank you" comment be flagged?
47581
Marking comments as 'addressed by edit' to reduce noise
59896
Why can't we ask for opinions?
131405
Why was "downvoting comments" declined? Should this feature be revisited?