There are two hooks in myCRED WordPress plugin, points for daily visits and points for login. I do not understand what is the different between them?
Points for Daily Visits
This hook allows you to award or deduct points from your users for visiting your website. This hook was built to award points maximum once a day irrelevant from which page a user visits.
Points for Logging In
This hook allows you to award or deduct points from your users for logging in to your website. To prevent abuse, you can set an optional daily limit.
From Hooks myCRED