First, let's start by defining what a lead is. A lead is a person who has indicated interest in your company’s products or services in some way. When a lead hears from your business, they’ve already opened a line of communication and are aware of what you do.
For example, let’s say you filled out a survey about vacation preferences for your family. You then receive an email from the company that hosted the survey, containing various vacation packages that might suit your family’s needs. It would feel far more relevant and far less intrusive than a cold-call from a travel agent, out of the blue, with no knowledge that you were even researching vacations.