Session cookie used by WooCommerce since v2.1
The cookie name is of the form wp_woocommerce_session_hhhh, where hhhh is a hashed version of the site URL.
The cookie contains information identifying the customer and session expiration time.
For guest shoppers this a randomly generated cryptographically strong ID.
Note: Since the cookie name is prepended with wp, cache systems like batcache will not cache pages when set.
The cookie duration is configurable.