What Are Cookies? 
A cookie is a small file that is downloaded onto your computer when you visit a website.  It allows us to recognize and tailor our site to you and it won’t harm your computer.  
Opting Out of Cookies
If you prefer, you can restrict, block or delete cookies by changing your browser settings but that may mean that you won’t be able to add and buy products from our store.
Which Cookies Do We Use?
Purpose Data Kind Sessional or Persistent?
Allows Shopify to store information about your session (referrer, landing page, etc..) Unique Token Sessional
storefront and
Used by our internal stats tracker to record the number of visits to the shop None Persistent for 30 minutes from the last visit
storefront and
Counts the number of visits to a store by a single customer None Expires midnight (relative to the visitor) of the next day
Stores information about the contents of your cart Unique token Persistent for 2 weeks
Stores session information for the checkout process Unique token Sessional
If the shop has a password, this is used to determine if the current visitor has access Unique token Indefinite
Keep in mind that what cookies you set depends on what Apps you may have. For example, if you use Google Analytics, then you will have a cookie named PREF. Other examples include Google maps, social sharing buttons or embedded youtube videos. For these, you should contact the App developer for information on what specific cookies are used and what they’re used for. 
If you have Apps installed on your Shopify online store, you should also include a chart that looks something like this: 
Do I Have This Cookie? Name Who Sets It? Purpose Sessional or Persistent?
Yes if my store uses
Google Analytics
PREF Google Tracking who visits 
the store and from
Persistent for
a very short 
Yes if my store uses
Unique to 
each user
PayPal Payment transactions Sessional