Entering a value greater than 0 will inject a cookie in the visitor's browser to tell our system the the visitor has arrived from a bypassed domain or IP address.
This will ensure they are not redirected again if they visit your website directly.
Your website http://website.com is setup to redirect Canadian visitors to http://website.ca
However you also have links in the Canadian website that goes to http://website.com
By adding the domain http://website.ca into the list of bypasses, if a Canadian visitor browsing on http://website.ca clicks on the link to http://website.com, they will not get forced redirected back to http://website.ca
In the bypass example above, if a cookie time is used, then the visitor (from Canada) can directly go to http://website.com again without getting forced redirected to the http://website.ca
Cookie time is entered in hours and there is no limit on the number of hours that can be entered.