Shoumik,
There are no Right or wrong answers , it all depends on what works with your audience. Assuming only title and description are visible to your audience before they decide to visit you are not, you need to maximise these
Ex:
People say the title should be descriptive enough and give users enough info on what it is all about
But again
Most news channels and many comedy sites do not use this funda. Their titles are least descriptie and utterly meaningless sometimes on purpose sometimes to evoke curosity
similar is the case with Descriptions
If you have a news site ,it is preferred to be clear and concise
If its poetry..Your punch lines could be used
If its a satire/funny:You need to decide
If its suspense: Title could be a question