Subscription module enable: This is to activate & deactivate the Subscription add-on in general. 
Main website page:  if it’s activate, then customers will be directed to the subscription page immediately 
Menu set for subscription menu :  You can use a specific menu set which will be displayed in your subscription menu  ( screenshot )

Advanced Menu Sets Setup:            

You can choose different menu to appear to customer everyday as per the advanced setup ( screenshot)

 

 

Don't show Subscription menu in general listing :  if it’s active, then the Subscription menu ( items won’t appear in the menu of one-time orders )

Disable custom subscription if there are packages :  if it’s active, then customers won’t be able to create customized subscription packages.  (Screenshot)

Maximum days of pause (before reactivated) : How many days you can pause the subscription.

Maximum pauses for subscription : how many time you can pause a subscription

Delay before pause/cancel (days) : how many days your customer should wait before another pause or to cancel the subscription.

Days for processing new subscription:  in the screenshot it’s 3 days, which means if the customer purchased a subscription package today, he will receive his first meal after 3 days