Why is products and completed operations liability relevant?

Depending on your business, this provides coverage for the work performed once it has been completed. For example, a mason who builds a wall, which soon after falls down due to faulty workmanship would be covered under this category. Any damage or injury caused because of this would be protected here. This, however, is NOT a warranty, meaning it does not cover the wall; just the damage or injury caused because of it falling on other people or other property.