Cookie Name	Cookie Description
PHPSESSID	To store the logged in user's username and a 128bit encrypted key.This information is required to allow a user to stay logged in to a web sitewithout needing to submit their username and password for each page visited. Without this cookie, a user is unabled to proceed to areas of the web site that require authenticated access.
form_key	A security measure that appends a random string to all form submissions to protect the data from Cross-Site Request Forgery (CSRF).
login_redirect	Preserves the destination page the customer was navigating to before being directed to log in.
mage-cache-storage	Local storage of visitor-specific content that enables e-commerce functions.
mage-cache-sessid	The value of this cookie triggers the cleanup of local cache storage.
user_allowed_save_cookie	Indicates if the shopper allows cookies to be saved.
mage-translation-storage	Stores translated content when requested by the shopper.
mage-translation-file-version	Stores the file version of translated content.

Cookie Name	Cookie Description
_ga	Used to distinguish users.
_gid	Used to distinguish users.
_gat	Used to throttle request rate.

E-Commerce

Fundamental key figures in e-commerce and how to calculate them