A Freedom to Operate (FTO) analysis is a search of patent databases to assess the risk of your product or process of infringing the rights of others. Think of it as checking a map for legal landmines before you start building and selling. It helps you identify this risk early, and take steps to mitigate it. For example you could avoid infringement by technical workarounds, market avoidance, a license to use/sell, or by challenging the patent.