A first-party cookie is
|“||a cookie placed by the website a user actually visits. . . . If a user visits an online shopping website, she might have a cookie placed on her machine so that the company can recognize the user when she move to another page on the site and remember what she put into her online shopping cart.||”|
"First-party cookies help sites remember:
- items in your shopping cart
- your log-in name
- your preferences, like always showing the weather in your home town
- your high game scores."