Storing State in Sessions

1. What's the difference between a cookie and a session?
A cookie is a marker that connects to the session, and had some stringfied data typicall in a JSON type object, Session is a domain concept.
2. What's serialization and how does it come into play with cookies?
Is stringifying an object, then it turns your object into strings
3. Can a cookie be shared by more than one user? How/why?
Cookies gets stored on a machine, so it can be used by more than one person but shouldn't be.
4. What would it mean to store a shopping cart in a cookie?
Less DB load, lose cross device availability
5. What advantages/disadvantages are there between cookie-stored carts and
database-stored carts?
cookie stored carts speed
db stored carts you can do across multiple devices, it's in the table its safe.