This is the first stop for any business insurance. This covers you for and property damage you cause, essential if lease your premises. If people come onto your property and injure themselves; if you manufacture or fabricate anything, you need liability for any products defects or failure. Liability insurance covers you for any injury or damages your goods may cause.
Also, should you ever be accused or sued, this cover picks up your legal fees and representation to prove whether you are negligent or not.
Public liability insurance generally covers accidents involving slipping and tripping. These policies will also include products liability, which is a must for any business that sells products to the public.