I assume you do not want your Internet Service Provider (ISP) to snoop on your online activities and then to sell your web surfing information to commercial companies. Your data should be valuable, private, and most important, it’s yours. You should be the owner of your data and no one else, especially not a commercial company interested in selling your private data, should have access to your data.
Luckily, there are easy ways to block the snooping. I have already written about using a Virtual Private Network (see https://privacyblog.com/?s=vpn for my articles). However, that may require a bit more technical knowledge that may scare away computer novices.
A second solution is to use the Tor web browser and networking package. See https://www.torproject.org/ for details. Tor is a well-known and reliable privacy solution. However, Tor does slow your network connections significantly and does require a bit of technical knowledge to use it effectively.