Professional Indemnity insurance is designed for professionals who provide advice or a service to their customers. It protects you against legal costs and claims for damages to third parties which may arise out of an act, omission or breach of professional duty in the course of your business.
If a mistake or omission occurs in the course of your work that results in financial loss or injury to a third party (e.g. a customer)—that customer may take legal action against you to recover their losses. Professional Indemnity insurance seeks to protect both your assets and your reputation, should this occur.