You should say:

• What the rule is about
• What happens when people break the rule
• Why you think it is an important rule
• And explain how you feel about the rule

Sample Answers: https://ieltsquangtri.com/describe-a-rule-that-is-important-in-your-school-or-at-work/

You should say:

• What it was
• How long he or she had this job
• How he or she got the job
• What skills this job needs
• And whether you would like to have this job in the future

Sample Answers: https://ieltsquangtri.com/describe-one-of-your-grandparents-job/

You should say:

• What is it
• Which song or poem it is from
• How you know it
• And explain how you feel about it

Sample Answers: https://ieltsquangtri.com/describe-a-line-that-you-remember-from-a-poem-or-a-song/