This is a crucial part of content marketing and you must approach this question in the right way. Here is why you can prefer saying in your answer.  “Even if the previous content is ranking but the factual data and numbers have changed with time then the reader won’t find the information valuable. It is necessary to constantly update the previous blogs every 5-6 months so that the facts and data can be updated. If this is not done it will leave a bad impression on the reader who could have been a potential customer. Also, updating the old content will help get new traffic to the website.”