Meta Descriptions are the little information served within 150-160 characters to the readers before even they click the link. It describes the insides of the link in the best possible way. Hence, the writers shall pay full focus on the quality of the meta description and use the relevant keywords in it for the readers to realise that the content inside will be helpful for them. Longer than the required descriptions are useless and serve no purpose. That is why it is suggested to keep the descriptions eye catching and to the point.