In Google sheets, comments allow you to ask questions, also allow you to reply to other persons' questions. Comments are very useful when multiple persons work on the same document. Google sheets make the comments view every easy.
Step 1: The number of comments displays in the sheet tab, e.g., 2 comments in "Sheet2";
Step 2: To view the comments in the sheet, right-click on the tab name and click "View comments";
Step 3: All the comments will display in the sheet;
Step 4: If you think the discussion is resolved, click the "Resolve" button to hide the discussion;
Step 5: To join the discussion, click the comment to open the reply box and type your comments in the box;
Step 6: You can also "Edit" or "Delete" the comments by clicking the edit button.