Public Liability Insurance can also provide cover in the event that you damage someone's reputation. This can be through misleading advertising, unfair comparisons of their services or use of their image or work without permission. It can cover what you do in print, on your website and even comments that you make on social media.
When it comes to their reputation, people can be extremely protective so you need to be very careful. However, they can also be very over-sensitive. Sometimes it doesn't matter whether you are in the wrong or not. It is important that you have the right insurance in the event that someone decides to take things to court.