Your Internet Service Provider has direct access to the type of information on you and your family that the National Security Agency uses for spying.
Your ISP knows when you are at home and when you are not, when your kids are doing their homework. They know or can know what you’re watching on Netflix (even when its encrypted) and YouTube. If any member of your household ever views pornographic content, your ISP knows how much and at what times such content is accessed. They can infer through traffic analysis how many people are living at your home and even know how many iPhone and Android devices that you have. And even though they cannot see into your encrypted search queries on Google, your ISP knows every medical website that you visited to research a condition that you think you have or are looking into a drug that your doctor has prescribed to you.