When you define lead analytics, you can take the word lead and the word analytics and define each one separately then combine both meanings to come up with a pretty concise definition of this marketing tool. A lead, sales lead or leads, when translated into internet jargon essentially means a person who may be looking to buy something from you. Analytics means decisions being made on the merits of data that has been gathered on a subject or a topic. Therefore, if you were to define lead analytics, it could easily mean decisions being made on data gathered about a person who is looking to buy from you.