This question is an exact duplicate of:
After asking a question, I may be interested in quick responses and react on comments quickly. So I leave the tab open. But I always need to check back to the tab to see whether there's a "something has been added" note somewhere, either a comment to the question, or a new answer or a comment update on an answer I already read. Couldn't this also be shown in the page title so I don't need to switch tabs all the time while I'm reading something else?