CEIP stands for Customer Experience Improvement Program. It collects and sends user experience data to Microsoft to improve future versions of Windows.
It is described by Microsoft with these words.
When you choose to participate in the CEIP, your computer or device automatically sends information to Microsoft about how you use certain products. Information from your computer or device is combined with other CEIP data to help Microsoft solve problems and to improve the products and features customers use most often.
We can disable the Scheduled Tasks that exist for CEIP.